I don't know what it means either. I make my living as a band director. Very few days ever go by I don't make at least two hours for practice. You can't play the trumpet at the highest level without serious practice. There are no short cuts, only what you are willing to put up with. I'm not talking about chop strength, that's the easy part. It's everything else that takes meticulous preparation. Read Chris Gekker's material, that's what takes time and focus.