Block individual time slots and individual days as well to make time for your other commitments/schedules.
Next, determine the duration of your availability windows to create a recurring availability on your booking page. Under 'Advanced Settings', look for 'Schedule Days' and click on the drop-down to select the number of days you'll stick to this availability window.
Will you only be available on Mondays, Wednesdays, and Fridays for 3 months? If so, select '90 days'.