As it is a Swyama Siddha Hanuman Mantra it does not have to get chanted for a fixed range of Mantra Repetitions for being able to utilize it. Particular worship and rituals and rules pertaining to path, sitting down mat, and counting rosary aren't advisable for chanting this Hanuman Mantra. https://andersonshviv.angelinsblog.com/31580871/the-hanuman-shabar-mantra-get-rid-of-all-problems-diaries