You've probably heard the common refrain, "Children are the leaders of tomorrow."

That is a common refrain in cable news these days.

It is a common refrain after each successful start.

- each of these six parts ending with a common refrain.

This was to become a common refrain over the next few months.

But it is a less common refrain for an international footballer.

They spoke of "serving the people," a common refrain among fighters.

"Not a moment to be lost," was their common refrain.

"I don't take their phone calls" was a common refrain.

But the most common refrain is simply, "What took so long?"