diff --git a/src/Orchard.Web/Modules/Orchard.AuditTrail/Drivers/AuditTrailTrimmingSettingsPartDriver.cs b/src/Orchard.Web/Modules/Orchard.AuditTrail/Drivers/AuditTrailTrimmingSettingsPartDriver.cs
index 1742915a0..8cd40d36c 100644
--- a/src/Orchard.Web/Modules/Orchard.AuditTrail/Drivers/AuditTrailTrimmingSettingsPartDriver.cs
+++ b/src/Orchard.Web/Modules/Orchard.AuditTrail/Drivers/AuditTrailTrimmingSettingsPartDriver.cs
@@ -3,6 +3,7 @@ using Orchard.AuditTrail.ViewModels;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.Drivers;
 using Orchard.Environment.Extensions;
+using Orchard.Localization;
 using Orchard.Localization.Services;
 using Orchard.Security;
 
@@ -11,12 +12,17 @@ namespace Orchard.AuditTrail.Drivers {
     public class AuditTrailTrimmingSettingsPartDriver : ContentPartDriver<AuditTrailTrimmingSettingsPart> {
         private readonly IAuthorizer _authorizer;
         private readonly IDateServices _dateServices;
+        private readonly IDateTimeFormatProvider _dateTimeLocalization;
 
-        public AuditTrailTrimmingSettingsPartDriver(IAuthorizer authorizer, IDateServices dateServices) {
+        public AuditTrailTrimmingSettingsPartDriver(IAuthorizer authorizer, IDateServices dateServices, IDateTimeFormatProvider dateTimeLocalization) {
             _authorizer = authorizer;
             _dateServices = dateServices;
+            _dateTimeLocalization = dateTimeLocalization;
+            T = NullLocalizer.Instance;
         }
 
+        public Localizer T { get; set; }
+
         protected override DriverResult Editor(AuditTrailTrimmingSettingsPart part, dynamic shapeHelper) {
             return Editor(part, null, shapeHelper);
         }
@@ -28,7 +34,8 @@ namespace Orchard.AuditTrail.Drivers {
             return ContentShape("Parts_AuditTrailTrimmingSettings_Edit", () => {
                 var viewModel = new AuditTrailTrimmingSettingsViewModel {
                     RetentionPeriod = part.RetentionPeriod,
-                    LastRun = _dateServices.ConvertToLocal(part.LastRunUtc)
+                    MinimumRunInterval = part.MinimumRunInterval,
+                    LastRunDateString = _dateServices.ConvertToLocalString(part.LastRunUtc, _dateTimeLocalization.ShortDateTimeFormat, T("Never").Text)
                 };
 
                 if (updater != null) {
diff --git a/src/Orchard.Web/Modules/Orchard.AuditTrail/Models/AuditTrailTrimmingSettingsPart.cs b/src/Orchard.Web/Modules/Orchard.AuditTrail/Models/AuditTrailTrimmingSettingsPart.cs
index 8bec9677c..e0ad80d5a 100644
--- a/src/Orchard.Web/Modules/Orchard.AuditTrail/Models/AuditTrailTrimmingSettingsPart.cs
+++ b/src/Orchard.Web/Modules/Orchard.AuditTrail/Models/AuditTrailTrimmingSettingsPart.cs
@@ -11,6 +11,14 @@ namespace Orchard.AuditTrail.Models {
             set { this.Store(x => x.RetentionPeriod, value); }
         }
 
+        /// <summary>
+        /// Gets or sets the miminum wait time in hours between audit trail trimming runs.
+        /// </summary>
+        public int MinimumRunInterval {
+            get { return this.Retrieve(x => x.MinimumRunInterval, defaultValue: 12); }
+            set { this.Store(x => x.MinimumRunInterval, value); }
+        }
+
         /// <summary>
         /// Gets or sets the time in UTC at which the audit trail was last trimmed.
         /// </summary>
diff --git a/src/Orchard.Web/Modules/Orchard.AuditTrail/Services/AuditTrailTrimmingBackgroundTask.cs b/src/Orchard.Web/Modules/Orchard.AuditTrail/Services/AuditTrailTrimmingBackgroundTask.cs
index cf719cdfa..83da1ae69 100644
--- a/src/Orchard.Web/Modules/Orchard.AuditTrail/Services/AuditTrailTrimmingBackgroundTask.cs
+++ b/src/Orchard.Web/Modules/Orchard.AuditTrail/Services/AuditTrailTrimmingBackgroundTask.cs
@@ -66,8 +66,8 @@ namespace Orchard.AuditTrail.Services {
         private bool GetIsTimeToTrim() {
             var lastRun = Settings.LastRunUtc ?? DateTime.MinValue;
             var now = _clock.UtcNow;
-            var interval = TimeSpan.FromHours(12);
-            return now - lastRun > interval;
+            var interval = TimeSpan.FromHours(Settings.MinimumRunInterval);
+            return now - lastRun >= interval;
         }
     }
 }
\ No newline at end of file
diff --git a/src/Orchard.Web/Modules/Orchard.AuditTrail/ViewModels/AuditTrailTrimmingSettingsViewModel.cs b/src/Orchard.Web/Modules/Orchard.AuditTrail/ViewModels/AuditTrailTrimmingSettingsViewModel.cs
index c0a426ea5..ec47152c5 100644
--- a/src/Orchard.Web/Modules/Orchard.AuditTrail/ViewModels/AuditTrailTrimmingSettingsViewModel.cs
+++ b/src/Orchard.Web/Modules/Orchard.AuditTrail/ViewModels/AuditTrailTrimmingSettingsViewModel.cs
@@ -1,8 +1,10 @@
 using System;
+using System.ComponentModel.DataAnnotations;
 
 namespace Orchard.AuditTrail.ViewModels {
     public class AuditTrailTrimmingSettingsViewModel {
-        public int RetentionPeriod { get; set; }
-        public DateTime? LastRun { get; set; }
+        [Range(0, Int32.MaxValue)] public int RetentionPeriod { get; set; }
+        [Range(0, Int32.MaxValue)] public int MinimumRunInterval { get; set; }
+        public string LastRunDateString { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/Orchard.Web/Modules/Orchard.AuditTrail/Views/EditorTemplates/Parts.AuditTrailTrimmingSettings.cshtml b/src/Orchard.Web/Modules/Orchard.AuditTrail/Views/EditorTemplates/Parts.AuditTrailTrimmingSettings.cshtml
index 1330a4853..ffd6f984a 100644
--- a/src/Orchard.Web/Modules/Orchard.AuditTrail/Views/EditorTemplates/Parts.AuditTrailTrimmingSettings.cshtml
+++ b/src/Orchard.Web/Modules/Orchard.AuditTrail/Views/EditorTemplates/Parts.AuditTrailTrimmingSettings.cshtml
@@ -7,8 +7,13 @@
         <span class="hint">@T("The number of days of audit log data to retain.")</span>
     </fieldset>
     <fieldset>
-        @Html.LabelFor(m => m.LastRun, T("Last run"))
-        @Html.TextBoxFor(m => m.LastRun, new { @class = "text", disabled = "disabled" })
-        <span class="hint">@T("Indicates the last time the audit trail trimming process was run. The trimming process runs every 12 hours.")</span>
+        @Html.LabelFor(m => m.MinimumRunInterval, T("Minimum run interval"))
+        @Html.TextBoxFor(m => m.MinimumRunInterval, new { @class = "text small" })
+        <span class="hint">@T("The minimum number of hours to wait between trimming process runs. Enter 0 for continuous trimming.")</span>
+    </fieldset>
+    <fieldset>
+        @Html.LabelFor(m => m.LastRunDateString, T("Last run"))
+        @Html.TextBoxFor(m => m.LastRunDateString, new { @class = "text", disabled = "disabled" })
+        <span class="hint">@T("Indicates the last time the audit trail trimming process was run.")</span>
     </fieldset>
 </section>