As this is a Swyama Siddha Hanuman Mantra it doesn't have to be chanted for a hard and fast amount of Mantra Repetitions for with the ability to use it. Particular worship and rituals and procedures about course, sitting mat, and counting rosary will not be advised for chanting this https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s