 You can actually use frequency for brainwave entrainment, it's as if you are giving your brain a special kind of music to help it chill out or focus better, and we have different brainwave entrainment programs, but how long should you use it for? Each brainwave entrainment session has its unique set of frequencies, yeah? The number of frequencies decides how long the session lasts. Now, you might ask, how long should I use it each day? Well, it's kind of like how you feel about it, you know? Some folks might groove with it for 30 minutes, while others might go for a couple of hours. It's all about what feels right for you. It all depends on your energy sensitivity. It boils down to knowing yourself and what works for you. Now, talking about Qigong, it's fascinating, right? Some people are super tuned in and can feel the Qi energy like right away, but others might not catch the energy immediately, so for those who don't feel much at first, they might need a bit more time to sync up with the program.