Not sure about when it will stop but a person I used to babysit for would do the routine then say "I'll come back and check on you in 1 min", go in check on him then "I'll come back and check on you in 2 mins" up to 5 then check on him every 5 mins til he's asleep. After the first few nights he'd be lucky to make it to 3 mins before he was asleep.