if nothing is leaking it shouldnt take more than 5 minutes. pump the front brake lever 5-10 times then hold, crack the bleader valve, pull the break all the way in, tighten the bleader valve after the air/oil mix has come out, dont let up the on break lever untill the valve in closed at all times. dont try to put your finger over the valve and do it the fast way. the break lines are so small it dont take but a few pumps on both sides.
make sure there is plenty on fluid in the res or you will be pumping air into your lines wich is what your trying to remove.