As this can be a Swyama Siddha Hanuman Mantra it doesn't have to become chanted for a fixed amount of Mantra Repetitions for being able to utilize it. Special worship and rituals and policies regarding direction, sitting down mat, and counting rosary are usually not advised for chanting this Hanuman https://usanetdirectory.com/listings13055157/the-basic-principles-of-hanuman-shabar-mantra-get-rid-of-all-problems