one chance in a million

one chance in a million

An extremely rare or unlikely chance, opportunity, or possibility. According to the tech company, there is only one chance in a million that their new facial recognition software could be fooled by a printed photograph. I knew it was one chance in a million to photograph the rare bird during its mating ritual.
See also: chance, million, one
Farlex Dictionary of Idioms.
See also:
  • a chance in a million
  • on the (off) chance
  • on the chance
  • lose out
  • lose out on (something)
  • lose out on
  • miss out
  • miss out on
  • miss out on (something)
  • once-in-a-lifetime chance