Chastity Duration: Let Fate Decide?

My wife Karen has recently agreed to keep me in chastity more frequently. However, she isn’t sure about the duration, so we’re looking for a good method to help her make that decision. I’m currently locked up for just over a day now, and she already feels bad for me. We used for the initial locking period; she holds the emergency code, and if I beg sufficiently, I suppose she’ll let me out early—which of course will be something I regret.

Does anyone here use a specific method, like rolling dice? Or maybe throwing a dart at a calendar?

How can we ensure we stick to the agreed number of days?

Thank you for your help and suggestions… Karen and William

I see Karen and William mentioned here, but I'm not quite sure what Faith has to do with this. Is she a friend of yours?

It must be a typo.... Faith or Fate. In any case, start small with just a few hours here and there, then gradually increase the time. My Keyholder prefers me Locked in only at home, but sometimes she enjoys Fulltime status—both at work and at home. I don't mind too much since it's more of a kinky game for us, though I think eventually she'll want full-time locking, so I try to practice that concept when possible. Currently, my KH wants one month before I'm allowed an Orgasm.