Hello and welcome to the Tableau forums. I apologize that no one has replied. Typically a response is much faster if you bring a few pictures to show as an example of the work involved or better yet, a tableau .twbx workbook with data that can be shared publicly.
I had a few questions about the goals here. Is the goal to show the percent of time a parking spot is in use, on average? by day of week? by time of day?
What is the goal of the of the viewer of the viz... what do they want to know in a glance?