One method that might work is looking at the users view access and activity. The activity will show whether the user was active, recently active, or idle.
Note: The above view does only display the last 24 hours of activity. A custom view would need to be created for the precise request.
More information on creating custom views can be found below.
Additionally, as with any Tableau visualization, I would start with what you have and deconstruct the access view that you have already and the additional view mentioned above to give yourself a good starting place.
For copies of the prebuilt admin views: Server Admin View Workbooks
Hope this helps!