
Now, if you assume 15 tampons PER cycle
in a 28-day cycle...
The Big Bang Theory Season 1, Episode 4

...between the number of chirps PER
minute and the ambient temPERature.
The Big Bang Theory Season 3, Episode 2

Based on the number of chirps
PER minute and the temPERature...
The Big Bang Theory Season 3, Episode 2

Four-point-one-eight-five-five times 10
to the seventh ergs PER calorie.
The Big Bang Theory Season 1, Episode 13

He was so busy figuring out
how many parts PER million of urine...
The Big Bang Theory Season 8, Episode 9