There is absolutely no rule for chanting this mantra but it is used at different places According to the problem. If you're using it then use it inside the manner given below.  ॥ ॐ नमो भगवते रुक्मिणीवल्लभाये स्वाहा ॥ Importantly, meditate and invite the universal cosmic energy to pour to the https://www.youtube.com/watch?v=WG3Cevb_VHM