Single comb, peacomb or rosecomb? it all plays a role...
Single comb could be up to 21 days.
Peacomb 10-14 days,
Rosecomb 7-10 days
if you have an agressive breeder could be shorter but not gauranteed.
I have a very aggressive LF Brn/red Cochin roo. Moved him over on Sunday and he is already taken advantage of the hens.