Which do you use?
Frying pans are skillets! FOOL
We know...but the question was "which one do we use"?
Frying pans is most commonly used.
Not in my part of the US--we use "skillet". The term "frying pan" is British and Northeast USA.
I have to say, but my namesake got into a bit of a muddle there - sorry Ben.
The question is obviously not:
Qu. Do you use a skillet or a frying pan, or both?
Qu. Do you use "skillet" (i.e. the word), "frying pan", or both.
Whilst frying pans are skillets (i.e. for all x, x is a frying pan iff x is a skillet) it is certainly not true that the word "frying pan" is the word "skillet"... FOOL
Here in Texas it's 6 one way, half a dozen the other. ;-)