When does the community user start bumping old questions?

Question

According to this the community user bumps old unanswered questions so that they get another shot at getting answered.

I've seen it do it a couple times in the past but it doesn't seem like it's a regular thing. It doesn't seem like it's doing it hourly as is stated in the meta.SO answer.

Is this something that just kicks in after X amount of days or after a certain threshold?

Answer 1

The Community user bumps some number* of randomly chosen questions per hour that meet the following criteria.

1. Is not closed
2. Does not have an accepted answer
3. Does not have an upvoted answer
4. Hasn't been bumped (by users or automated actions) in last 30 days
5. Has a non-negative score

_{*On AskUbuntu, this number is 1. It varies across the network.}