How often does Spotlight run the Customer Counter? (4284333)

After creating a Custom Counter and adding a query, how often does that query get executed by Spotlight?

Concerning the Custom Counter's execution frequency:

1. With the Spotlight client (i.e. GUI) opened, it is every 15 sec (This cannot be changed)

2. With the Spotlight client closed, the default scheduling is as follows (This can be changed from Configure | Scheduling | Custom Counters):
      - Every 5 minutes for Playback (to Playback Database)
      - Every 6 hours for Reporting (to Spotlight Statistic Repository)