To add a recurring visit please click Schedule in the menu, then add the New Event button.
In most cases you need to click "Visit To Customer" in the drop down menu:
On the New Visit page pick "Recurring Series of Visits" as the type and then you can choose if the visit should repeat Daily, Weekly, Monthly or Yearly.
For example to have a visit every other week select Weekly and set up a visit every 2 weeks. Please see screenshot below:
If you do not have an end date you could set the "Total Number of Visits" to 80, which should run for 3 years if you are setting up a bi-weekly visit.
Then please select the Customer, the Property and fill the other fields on the bottom of the page.
Once you are done click "Create Visit" to create you recurring visit.