diff --git a/core/forms.py b/core/forms.py
index c988838..bc3ef87 100644
--- a/core/forms.py
+++ b/core/forms.py
@@ -8,10 +8,9 @@ from core.lib.rules import NotificationRuleData
 
 from .models import NotificationRule, NotificationSettings, User
 
-# from django.forms import ModelForm
+# flake8: noqa: E501
 
 
-# Create your forms here.
 class RestrictedFormMixin:
     """
     This mixin is used to restrict the queryset of a form to the current user.
@@ -89,16 +88,20 @@ class NotificationRuleForm(RestrictedFormMixin, ModelForm):
         fields = (
             "name",
             "data",
+            "interval",
+            "window",
             "priority",
             "topic",
             "enabled",
         )
         help_texts = {
             "name": "The name of the rule.",
-            "priority": "The priority of the rule.",
+            "priority": "The notification priority of the rule.",
             "topic": "The topic to send notifications to. Leave blank for default.",
             "enabled": "Whether the rule is enabled.",
             "data": "The notification rule definition.",
+            "interval": "How often to run the search. On demand only evaluates messages as they are received.",
+            "window": "Time window to search: 1d, 1h, 1m, 1s, etc.",
         }
 
     def clean(self):
diff --git a/core/migrations/0016_notificationrule_interval_notificationrule_window.py b/core/migrations/0016_notificationrule_interval_notificationrule_window.py
new file mode 100644
index 0000000..7931043
--- /dev/null
+++ b/core/migrations/0016_notificationrule_interval_notificationrule_window.py
@@ -0,0 +1,23 @@
+# Generated by Django 4.1.3 on 2023-01-14 14:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0015_notificationrule_topic'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='notificationrule',
+            name='interval',
+            field=models.CharField(choices=[('ondemand', 'On demand'), ('minute', 'Every minute'), ('15m', 'Every 15 minutes'), ('30m', 'Every 30 minutes'), ('hour', 'Every hour'), ('4h', 'Every 4 hours'), ('day', 'Every day'), ('week', 'Every week'), ('month', 'Every month')], default='ondemand', max_length=255),
+        ),
+        migrations.AddField(
+            model_name='notificationrule',
+            name='window',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+    ]
diff --git a/core/models.py b/core/models.py
index 22fc2bd..853937b 100644
--- a/core/models.py
+++ b/core/models.py
@@ -23,6 +23,18 @@ PRIORITY_CHOICES = (
     (5, "max"),
 )
 
+INTERVAL_CHOICES = (
+    ("ondemand", "On demand"),
+    ("minute", "Every minute"),
+    ("15m", "Every 15 minutes"),
+    ("30m", "Every 30 minutes"),
+    ("hour", "Every hour"),
+    ("4h", "Every 4 hours"),
+    ("day", "Every day"),
+    ("week", "Every week"),
+    ("month", "Every month"),
+)
+
 
 class Plan(models.Model):
     name = models.CharField(max_length=255, unique=True)
@@ -147,6 +159,10 @@ class NotificationRule(models.Model):
     name = models.CharField(max_length=255)
     priority = models.IntegerField(choices=PRIORITY_CHOICES, default=1)
     topic = models.CharField(max_length=255, null=True, blank=True)
+    interval = models.CharField(
+        choices=INTERVAL_CHOICES, max_length=255, default="ondemand"
+    )
+    window = models.CharField(max_length=255, null=True, blank=True)
     enabled = models.BooleanField(default=True)
     data = models.TextField()