It would be a once-in-a-lifetime chance to find out.

From another perspective, it is a once-in-a-lifetime chance to do and study whatever gets you going!

These are once-in-a-lifetime chances that won't happen for 99 percent of them again.

I always wanted to visit America and this is a once-in-a-lifetime chance.

It was literally a once-in-a-lifetime chance for both of us, and I'm terribly glad we went.

He says the whole thing in Nipponese except for "once-in-a-lifetime chance."

The first half of next year is a once-in-a-lifetime chance to explore these countries at a bargain price with much smaller crowds than usual.

We should be thinking of Wednesday as a once-in-a-lifetime chance.

The sale gave some buyers a once-in-a-lifetime chance to make a debut on a Broadway stage.

All the while he was thinking out loud, talking about missed opportunities and once-in-a-lifetime chances.