
also my way is
a happy COINCIDENCE.
The Big Bang Theory Season 5, Episode 19

Oh, what a COINCIDENCE.
You can discuss that with him...
The Big Bang Theory Season 3, Episode 5

No, it wasn’t a COINCIDENCE."
Money Heist Season 1, Episode 8

What an odd COINCIDENCE
that you're both here.
The Big Bang Theory Season 7, Episode 7

...people unfamiliar with the law
of large numbers would call a COINCIDENCE.
The Big Bang Theory Season 1, Episode 4