As this is the Swyama Siddha Hanuman Mantra it does not have for being chanted for a fixed amount of Mantra Repetitions for being able to utilize it. Exclusive worship and rituals and procedures with regards to path, sitting mat, and counting rosary are not encouraged for chanting this Hanuman https://directoryholiday.com/listings13190939/hanuman-shabar-mantra-get-rid-of-all-problems-fundamentals-explained