As it is a Swyama Siddha Hanuman Mantra it doesn't have to become chanted for a hard and fast quantity of Mantra Repetitions for being able to utilize it. Particular worship and rituals and rules about course, sitting mat, and counting rosary will not be suggested for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s