As this is a Swyama Siddha Hanuman Mantra it doesn't have being chanted for a hard and fast number of Mantra Repetitions for having the ability to utilize it. Exclusive worship and rituals and rules concerning route, sitting down mat, and counting rosary aren't encouraged for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s