As this is the Swyama Siddha Hanuman Mantra it doesn't have to be chanted for a fixed number of Mantra Repetitions for with the ability to utilize it. Specific worship and rituals and regulations about way, sitting down mat, and counting rosary are usually not proposed for chanting this Hanuman https://wodirectory.com/listings13063021/top-guidelines-of-hanuman-shabar-mantra-get-rid-of-all-problems