Game Review Timing

Since I can't do sales realistically on a week-to-week basis, I need to know when to release all the sales at once. This would include all sales of something in past (insert chosen time here). I need to know how often people want  sales to stop or the figures to be released, keeping in mind, that I can't be there all the time. So without further ado:

How Often Should I Bundle Sales? Monthly Bi-monthly Every 3 Months Every 6 months Every year Other (explain in Off-topic if possible).