As this is the Swyama Siddha Hanuman Mantra it does not have to be chanted for a set amount of Mantra Repetitions for being able to utilize it. Particular worship and rituals and guidelines about course, sitting mat, and counting rosary will not be encouraged for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s