How can I create a segment to send messages only to users who have received fewer than a certain number of push notifications recently (e.g., less than 2 pushes in the last 7 days)?

To avoid over-messaging, you can build a segment on the PW_NotificationSend default event, which fires every time a Pushwoosh message is sent to a user.

Steps to create the segment:

1. Go to Audience → Segments and create a new segment (or edit an existing one).
2. In Add filter by, choose Event.
3. Select the PW_NotificationSend event.
4. Set the occurrence condition and the time frame. To target users who got at most one push in the last week:
   • Condition: exactly or less, Times: 1
   • Time frame: during the last N days, Value: 7
5. Optionally enable Include all user devices if you want the whole user (all their devices) in or out of the segment rather than only the matching device.

Important notes:

• PW_NotificationSend starts collecting data only from the moment it is enabled for your project, so the segment considers messages sent after activation.
• To segment on users who opened notifications instead, use PW_NotificationOpen with the same kind of condition.
• Users with no PW_NotificationSend events at all may not be matched by an occurrence condition; if you need "0 or 1 push", check the resulting segment size before relying on it.
• For an automatic, account-wide cap instead of a hand-built segment, use Global frequency capping: Settings → Message delivery settings → Frequency capping, where you set a maximum number of messages per user per channel and period. See Global frequency capping.

See also Build segments by events and Default events.