This job is a once in a lifetime opportunity.
A once in a lifetime trip can be expensive.
Winning the jackpot in the lottery is a once in a lifetime event.
Puberty is a stage in life for everyone once in a life time.
The manifold machine could perform multiple functions at once.
The manifold machine could perform multiple functions at once.
Full milk production only resumes once lambing is complete.
But no one can foresee clearly what will occur once a war starts.
He wasn't always Dead, he was once living and breathing like you and me.
Farming was once famous for it's thriving economy.
There is truth in the phrase "once bitten - twice shy". David was bitten once on the leg by an angry dog. Once the door was opened, the people went inside.
The second one a once-in-a-lifetime experience
She had the notion of recommending a subordinate for promotion which turned out to be a bad idea once she considered his work record .
That is the correct spelling of "once in a lifetime."