For those who would like a hint.
In English, “And” generally indicates addition, “Per” division.
Now consider which of the following makes sense:
Ferrets and seconds
Ferrets per second
But apples and pears makes sense, whereas apples per pear doesn’t (much)
Neither
For those who would like a hint.
In English, “And” generally indicates addition, “Per” division.
Now consider which of the following makes sense:
Ferrets and seconds
Ferrets per second
But apples and pears makes sense, whereas apples per pear doesn’t (much)
Neither