You can do this Shabar mantra chanting for 11, 21, 31, or forty one days, the area and time of mantra chanting should be the identical for the number of times you would like to do sadhana. You need to use Rudraksha or Tulsi rosary to chant the mantra. https://eduardovdiou.ampedpages.com/a-simple-key-for-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-unveiled-59463770