Click triple dots and select 'Edit & Schedule':
Go to the ‘Settings’ tab. Drag the toggle 'Policy Scheduled' to the right (1) and select the preferable frequency in the drop-down list (2).
To schedule several policies at a time, go to the section 'Policies list' and check the boxes near required policies. Click ''Schedule Selected'', select the preferable frequency and click ''Save selected''.
The policies that will potentially create a lot of violations should be run less frequently.