As that is a Swyama Siddha Hanuman Mantra it does not have to get chanted for a set quantity of Mantra Repetitions for being able to utilize it. Specific worship and rituals and policies relating to route, sitting mat, and counting rosary are not advisable for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s