Oh. That happens to be Dr. Koothrappali's
field of EXPERTISE.
The Big Bang Theory Season 6, Episode 3
...we have to concede
her undeniable EXPERTISE...
The Big Bang Theory Season 2, Episode 3
Your EXPERTISE
could be useful here.
Breaking Bad Season 4, Episode 3
...I'm relying on your EXPERTISE
regarding duration.
The Big Bang Theory Season 3, Episode 15