As it is a Swyama Siddha Hanuman Mantra it doesn't have being chanted for a hard and fast amount of Mantra Repetitions for being able to use it. Distinctive worship and rituals and policies relating to way, sitting mat, and counting rosary aren't suggested for chanting this Hanuman Mantra. The https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s