You can create a recurring series that repeats every week, every 2 weeks (bi-weekly), every 3 weeks, and so on.
Start by creating a session and set it to repeat weekly. Make sure you have the time, service code and rate set correctly. (If you have multiple clinicians on your account, make sure you also set the correct clinician for this session).
Then select how frequently you'd like the session to repeat: every week, every 2 weeks, every 3 weeks, etc:
Then select the day(s) of the week you'd like the session to occur:
Then select when the appointment series should end. You can select a number of appointments or you can select a date for the series to end:
Click "Done" to set your recurring sessions. You can then reopen the appointment from your calendar to review the details of the recurring series. Click "Change" to make any changes: