As this is the Swyama Siddha Hanuman Mantra it does not have to be chanted for a set quantity of Mantra Repetitions for being able to utilize it. Distinctive worship and rituals and rules concerning path, sitting mat, and counting rosary usually are not advised for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s