As that is a Swyama Siddha Hanuman Mantra it does not have to be chanted for a fixed number of Mantra Repetitions for with the ability to utilize it. Unique worship and rituals and regulations concerning course, sitting mat, and counting rosary will not be recommended for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s