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