once-in-a-hundred-years/ -year(+noun) 2020/03/26 21:10 Share on Facebook Copy URL Report once-in-a-hundred-years/ -year(+noun)Australian Prime Minister Scott Morrison warned that the crisis could last six months. He said “This is a once-in-a-hundred-year type event” as his country moved to restrict gatherings and overseas travel.learningenglish.voanews.com/a/addition..