As this can be a Swyama Siddha Hanuman Mantra it doesn't have to be chanted for a hard and fast variety of Mantra Repetitions for being able to utilize it. Exclusive worship and rituals and regulations pertaining to direction, sitting mat, and counting rosary aren't advisable for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s