When you look at red, you see red. You don't see "frequency" or "light" or any other thing we invented to describe red. When you say red I know immediately what you mean because I am also experiencing the color red. It doesn't require any further description. Descriptions are not the thing, we invented frequency as a measure, it's a concept. It doesn't exist in the real world. The real world is the one that you experience through your senses. It has colors and sounds and tastes and feels. It doesn't have frequencies or any kind of units or measures, those are made up concepts or abstractions over the thing we are experiencing.