As this can be a Swyama Siddha Hanuman Mantra it doesn't have for being chanted for a hard and fast variety of Mantra Repetitions for being able to use it. Unique worship and rituals and procedures about direction, sitting down mat, and counting rosary are not recommended for chanting this https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s