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. Specific worship and rituals and principles about route, sitting down mat, and counting rosary will not be recommended for chanting https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s