How do I schedule 2 visits per day for 1.5 days (3 visits total)?

The system is set up for users to select the calendar date and number of walks per day. So, in this case. I'd likely select the day from the calendar when the 2 visits are scheduled and then choose 3 for the total number of visits.

I'd suggest documenting the actual dates and times in the message box (On <date> 2 visits approx. <time> AM & <time> PM and On <date> 1 visit approx. <time>). That way there's written details that all agree to and it ensures Rover support for the entire coverage time.