There's really not any amount of times that you have to pluck hair before it stops growing.
Plucking your hair no matter how many times you do it will not stop the hair growing.
However if you pluck your hair too many times it may cause damage to the hair follicles.
Although when you do pluck a hair you are damaging the follicle, and with enough damage the hair may not grow back.
Plucking hair only removes the hair from the root, but it doesn't help new hair from growing in the same follicle.
In fact, plucking hair can potentially damage the hair follicle, leading to thicker, coarser hair growth.
The only way to fully and permanently remove hair is to have laser hair removal treatments.
Laser hair removal treatments can work to stop the hair growth although you often need a few more treatments for it to work.
Regularly plucking your hair can also increase the likelihood of ingrown hairs, where hair grows back into the skin rather than out.
Over time, the repeated trauma to the hair follicles from plucking your hair may weaken them, potentially leading to finer hair growth or, in some cases, hair loss.