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