diff --git a/content/momentum/3/3-ad/ad-appendix-adaptive-rules.md b/content/momentum/3/3-ad/ad-appendix-adaptive-rules.md
index 0251dc9ca..fae11957d 100644
--- a/content/momentum/3/3-ad/ad-appendix-adaptive-rules.md
+++ b/content/momentum/3/3-ad/ad-appendix-adaptive-rules.md
@@ -50,7 +50,8 @@ received during a delivery attempt.
   trigger: triggering threshold 
            if set to 1, trigger on the first occurrence
            if set to "C/S", where C is a count and S is a number of seconds,
-           (e.g. 10/1 for 10 per second) trigger when the rate is crossed
+           trigger on the Cth occurrence within S seconds (e.g. 10/1: the
+           10th occurrence within one second)
   action:  the action to take when the rule is triggered.
            {"suspend", "4 hours"} -- causes suspension for 4 hours
            {"blackhole", "4 hours"} -- blackhole domain for 4 hours
diff --git a/content/momentum/3/3-ad/ad-custom-rules.md b/content/momentum/3/3-ad/ad-custom-rules.md
index 2f02c3db8..f85543163 100644
--- a/content/momentum/3/3-ad/ad-custom-rules.md
+++ b/content/momentum/3/3-ad/ad-custom-rules.md
@@ -55,7 +55,7 @@ The elements of the responses table are as follows:
 
 *   `trigger` – The trigger threshold
 
-    If this element is set to `1`, the action is triggered on the first occurrence of the code. You can also set this to the number of occurrences per given period. For example, `10/1` triggers the action when more than 10 occurrences of this code are detected per second.
+    If this element is set to `1`, the action is triggered on the first occurrence of the code. You can also set this to the number of occurrences per given period. For example, `10/1` triggers the action when 10 or more occurrences of this code are detected within one second. A count of 1 per period (for example, `1/60`) triggers on every occurrence, like `1`.
 
 *   `action` – The action to take when a rule is triggered. Valid actions are as follows: