There is not any rule for chanting this mantra however it is made use of at various destinations According to the specific situation. When you are utilizing it then utilize it in the method supplied underneath.  ॥ ॐ नमो भगवते रुक्मिणीवल्लभाये स्वाहा ॥ Its usefulness is often attributed into the science https://www.youtube.com/watch?v=WG3Cevb_VHM