Duration requirements vary widely as well, from 6 to 15 minutes.

Run times can vary from 15 minutes to an hour or longer.

Game (mission) length can vary from 5 to 20 minutes depending on the target.

Performance duration can vary from 10 to 19 minutes.

The time spent on training also varied from fifteen minutes to well over an hour.

Some games require a game board; playing time varies from 5 to 60 minutes.

It varies from 20 minutes to 15 hours or more.

Thus the time spent on the physical abuse referrals varied from 30 minutes to 20 hours.

The time to vote varies greatly from 5 to 20 minutes.

Treatment time varies from 15 minutes to 90 minutes a day.