Rep PR max effort work or 1 rep max effort work?
What does the 5/3/1 for powerlifters say??
Um... If you haven't looked at programs which have been shown to work so you know what they have to say about how often it is useful to max... Then what are you doing trying to design your own program?? Why not go with what people KNOW works... Then when you stall on it / want to mix things up a bit try tweaking just ONE thing and seeing how that suits you??
Otherwise. The answer is 7.638 days. Unless there is a full moon in there. In which case 8.543.