I think ideally you'd do it maybe every day or so, so that if the user goes offline for a while, or the server you're running goes down or something, the pass w

I think ideally you'd do it maybe every day or so, so that if the user goes offline for a while, or the server you're running goes down or something, the pass will continue to work for at least 6 days. It buys you a lot of time to fix things.