frame of mind = state/condition of mind. The sentence means Wherever there is an involvement of the person’s frame of mind in managing a particular problem, and in my opinion which(the involvement) is more or less everywhere, there is some potential gain to be made through the application of hypnotic patterns. Whoever wrote this,wrote it a bit difficultly.

Frame of mind: The kind of thoughts and emotions that are, in that lapse of time (short or long), in your mind. For instance: {serenity, anxiety, happiness, sadness, anger, love, desire to walk, desire to think deeply ... } I we were only free to change our frame of mind at the push of a button ..., or maybe repeatedly pulling our left ear as in a turning knob, that would be really cool! (Anyway doing that on somebody else should be considered quite unpolite, or even totally banned!)