@Shirish ji
You can plz read this article by Sharat Sir in using VK and sw
https://www.litairian.com/proxy-chanting-switchwords-phrases-easy/
Regarding healing time , please read the VK Basic Post 13
https://forum.litairian.com/discussion/370/13-how-many-times-in-a-day-frequency-to-place-a-request-to-vk-and-for-how-long#latest
