1st Step : Create a smartlist
Click on 'Marketing' > 'Smartlist' > 'Add a Smartlist' > Fill in the name and description then 'Save'.
2nd Step : Add a filter
Click on 'Add new filter' > 'Bookings' > 'Number of appointments'.
Set up the filters depending on your criteria and click on 'Add'.
Click on 'Export list' to download the list or click on 'Members lists' to check the members that fill in these criteria.