Docs: monthly reports (#25964)

* Docs: monthly reports

* Docs: version available

* Docs: feedback from Diana and Agnes.

docs/sources/enterprise/reporting.md

@@ -69,7 +69,7 @@ Hourly reports are generated once per hour. All fields are required.
 
 
 Daily reports are generated once per day. All fields are required.
 Daily reports are generated once per day. All fields are required.
 
 
-* **Time -** Time of day in 24 hours format when the report should be sent.
+* **Time -** Time the report is sent, in 24-hour format.
 * **Time zone -** Time zone for the **Time** field.
 * **Time zone -** Time zone for the **Time** field.
 
 
 #### Weekly
 #### Weekly
@@ -77,7 +77,17 @@ Daily reports are generated once per day. All fields are required.
 Weekly reports are generated once per week. All fields are required.
 Weekly reports are generated once per week. All fields are required.
 
 
 * **Day -** Weekday which the report should be sent on.
 * **Day -** Weekday which the report should be sent on.
-* **Time -** Time of day in 24 hours format when the report should be sent.
+* **Time -** Time the report is sent, in 24-hour format.
+* **Time zone -** Time zone for the **Time** field.
+
+#### Monthly
+
+> Only available in Grafana Enterprise v7.1+.
+
+Monthly reports are generated once per month. All fields are required.
+
+* **Day in month -** Day of the month when the report should be sent. You can select `last` for reports that should go out on the last day of the month.
+* **Time -** Time the report is sent, in 24-hour format.
 * **Time zone -** Time zone for the **Time** field.
 * **Time zone -** Time zone for the **Time** field.
 
 
 #### Never
 #### Never