Question

The opportunity of a lifetime = a once-in-a-lifetime opportunity  a very good opportunity that you will only get once. / For many athletes, the Olympics are the opportunity of a lifetime. / A once-in-a-lifetime opportunity to travel to New York was too hard to turn down.

Accepted Answer

Noun + Noun

Collocation	The opportunity of a lifetime = a once-in-a-lifetime opportunity
Type	Noun + Noun
Examples	a very good opportunity that you will only get once. / For many athletes, the Olympics are the opportunity of a lifetime. / A once-in-a-lifetime opportunity to travel to New York was too hard to turn down.

Opportunity Once In A Lifetime Noun Lifetime Good Athletes Olympics Travel