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

Huh? Can't be a COINCIDENCE.
The Big Bang Theory Season 1, Episode 12

It's an amazing COINCIDENCE.
Can we leave it at that?
The Big Bang Theory Season 3, Episode 3

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

- That can't just be a COINCIDENCE.
- Ugh.
The Big Bang Theory Season 3, Episode 17