Right now, the algorithm is by default like this:
1. 90 sec
  1. 30 min
  2. 12 h
  3. 2 days
  4. 2 weeks
  5. 2 months
It would be perfect if the user can modify the algorithm. For example I like it this way: 4 h - 12 h - 2 day - 1 week - 2 weeks - 2 months