As this can be a Swyama Siddha Hanuman Mantra it does not have for being chanted for a fixed amount of Mantra Repetitions for being able to utilize it. Unique worship and rituals and procedures relating to route, sitting mat, and counting rosary are not recommended for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s