Is going commando in a skirt or sundress actually common or not?

So ladies of GAG, (Girls ask guys) how common is it that women go with no underwear under a skirt or sundress.

If you never go or rarely what is your go to underwear for skirts and sundesses
I go commado all the time
I go commando from time to time
I go commando once in a blue moon or special occasion
I never go commando