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
What a COINCIDENCE.
It's the future Mrs. Wolowitz.
The Big Bang Theory Season 2, Episode 7
Huh? Can't be a COINCIDENCE.
The Big Bang Theory Season 1, Episode 12
It's probably just a COINCIDENCE.
The Big Bang Theory Season 9, Episode 24