As a longtime fan and listener of American Top 40, I have become fascinated with many aspects of the show, such as the Long Distance Dedication segment, trivia questions, AT40 station list, the jungles, and etc. There is one aspect of the show that has really been bugging me lately and that is when Casey used to use the "notches" word. That was in terms of the song movement on the charts. I have a couple of questions about the "noches" word.
1. Where did Casey come up with the "notches" word? 2. Why did he decide to use it as the undisputed word for songs movement on the charts?
At times through the years, he did describe the song movement as steps, positions, spots, rungs and etc, but "notches" was the word that he used the most in terms of song movement.
Rob Durkee's book says that while Casey initially used varying terminology ("steps", "positions", etc.) to describe chart movements, by about 1972 he thought that "notches" was easy to understand and visualize, and settled on it as his main (though not exclusive) chart descriptor term.