Strength is also a skill too. Not just something that is always available like you're grizzly adams or something. You can't just build up piles of muscles and then lay around waiting to use them to impress your friends. You have to keep feeding them. You play pool everyday for years, you get good. You leave it alone for a while, you still have the angles and knowledge, but not the sharpness. With strength you also lose the muscle mass too depending on how long you are away.
In my opinion to answer your question, you lose "strength" probabaly a month or two from when you stop needing it or making your body do it. But you lose the "skill" a lot quicker than that, maybe as soon as a week depending on your ability level and experience.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.
Everything competes for recovery so more assistance is not always the best idea. miked96