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