Thanks for the question! While you can’t get a display for this directly within the app itself, you could use the graphing widgets or even a list page to get the data you want.
The underlying entity tracking the data is called a Booking. In the example below, I’m on a Booking page grouping by “Assigned To” to get the total amount of time booked per-person, but you can rearrange things on the page to suit your needs. The Duration field in the screenshot is a Calculated Field that shows the difference in days between the start and end date.