
Sincerely, Maggie McGarry."
The Big Bang Theory Season 4, Episode 6

Sincerely, I don’t think
we’re the perfect couple.
Money Heist Season 1, Episode 1

and I mean that politely,
not SINCERELY.
The Big Bang Theory Season 11, Episode 9

I SINCERELY hope so.
The Big Bang Theory Season 2, Episode 14

and I would like
to SINCERELY apologize.
The Big Bang Theory Season 12, Episode 5