Hi Sonia- Julianne from Mixpanel Support here.
The computed 'Duration' property can be used to see the time users spent on a page, but it won't be limited to within one session. If you have property-based sessions, you could add a breakdown on the session ID to see the duration per session. However, beyond that, it wouldn't be possible to aggregate the duration for a specific page within a session.Ā
