Time on page is available as part of Pages. To learn more, see our Pages overview.
You can also use the Average Time Between analysis to see the average time between two specific events. For details, see What does Average Time Between Measure?
In the usage over time chart we have Session Duration, which shows the median time from the start of a session until the time of the last pageview, click, or touch event in the session.
Session duration is also available as part of the acquisition chart type. To learn more, see Acquisition analysis overview.
To set up a Heap Connect query equivalent to this chart, see Average Time on Page.