If you wish to kill your nafs for a long time then do this wazifa when only. You will never ever hear your nafs suggesting to complete almost any sins again. For 11 or 21 years old or 41 days to weeks, not for cease, study
YA MOAKHIR-O Allahs identify, 846 instances, each day, right after asr salah.
Salavat / darood 9 instances ahead of as well as right after.
Undertake it with regard to 11 days to weeks 1st and pay attention to if the nafs continues, in case sure then continue with regard to a different 10 days to weeks, if at all however generally there then continue a different 20 days to weeks. In this time your nafs are going to be long gone for a long time.