As it is a Swyama Siddha Hanuman Mantra it does not have being chanted for a set variety of Mantra Repetitions for having the ability to utilize it. Exclusive worship and rituals and regulations about way, sitting mat, and counting rosary are not suggested for chanting this Hanuman Mantra. The https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s