Based on the number of chirps
PER minute and the temPERature...
The Big Bang Theory Season 3, Episode 2
As PER your suggestion,
we're hanging out.
The Big Bang Theory Season 4, Episode 5
That's 4.9 Penny Blossoms PER hour.
The Big Bang Theory Season 2, Episode 18
And the policeman says, "Did you know
you were going 85 miles PER hour?"
The Big Bang Theory Season 10, Episode 21
He was so busy figuring out
how many parts PER million of urine...
The Big Bang Theory Season 8, Episode 9