This setting determines if and when Last Visit™ automatically runs processing jobs. The first field is the interval field, and the drop-menu is the increment.
To set how often Last Visit™ runs a processing job insert a number into the interval field and select an increment from the drop-menu. This not only enables automatic processing, but also sets when it is done.

To disable automatic processing simply set the interval to zero.

In the example below, automatic processing is turned off.

In the example below, Last Visit™ is set to run a processing job after every 30 days.