Androgen Receptors are recyled all the time. the half life of AR receptors is very short. So refershing recptor is a myth.
What realy happens is that the body will adopt to high levels of androgens by downregulating the AR recptors (decreasing the number), this happens in long and heavy cycles. So if you planning to run a cycle more than 12 weeks you may want to deacrese the dosage toward the end.
After the cycle is done, and you stopped taking any androgens, the body will detect low levels of androge receptos, and act by upregulating it. A rebound may happen to recptors during PCt (recptor lvels highier than normal), but the body will detect this, and adjust the AR levels to homostasies. I would say it will take the body a month or two to level off and come back to normal.