Is there a way to know the time spent on HA dashboard?

Hi everyone! Thank you all for your work!

I’m a PhD student and I’ve decided to use Home Assistant as an indoor environmental quality monitoring system for my case studies (4 small apartments).
Is there any way to know how many log ins the occupants (or a user in general) do or the time they spend on the HA dashboard? I’ve already had their permission.
For my research it is important to know if the data visualization tool is useful for behavioral change (optimizing indoor comfort while reducing energy consumption). Thus I need to verify if occupants use the platform.