if I had a nickel for every time he _______, Id be a millionaire

If I had a nickel for every time he _______, Id be a millionaire is another way of saying that he (or she) did this thing over and over again. By saying you would be a millionaire if you had a nickel for every time they did this, it means they must do it a lot of times because it would take a lot to turn nickels into millions of dollars. This is simply a way to exaggerate how much someone does something.