Shows how many days passed on average between visits.

Calculation"User Profile - Days since First Contact" / "User Profile - Visits" * 100                                                            
Example

A user made ten visits. The first visit was 100 days ago.
The value for "User Profile - Visit Frequency Avg. (Days)" is 10.

Note that the use of this metric over time is usually not useful, as there is no time reference.