Eighteen parts PER million.
The Big Bang Theory Season 8, Episode 9
of 4.6 yoctometers
PER femtosecond.
The Big Bang Theory Season 5, Episode 18
Look, what was the price PER head
last time? I'll triple it.
Breaking Bad Season 5, Episode 13
200 million euros printed PER day.
Money Heist Season 1, Episode 8
Based on the number of chirps
PER minute and the temPERature...
The Big Bang Theory Season 3, Episode 2