As this is the Swyama Siddha Hanuman Mantra it doesn't have to be chanted for a fixed amount of Mantra Repetitions for with the ability to utilize it. Distinctive worship and rituals and regulations about way, sitting down mat, and counting rosary are certainly not encouraged for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s