Which preposition to use with drugstores

at Occurrences 1%

There was a drugstore at the corner with a public telephone station, and two minutes later, I was asking to be connected with the city-room at the Record office.

for Occurrences 1%

She had sent down to the book-store for ten cents' worth of tinted note paper and to the drugstore for some of Harriet's favorite sachet powder.

on Occurrences 1%

" Meanwhile Frank had proceeded direct to the drugstore on the corner, about two blocks away from the end of the green, where they had told him he could talk over the long distance phone with Bloomsbury.

Which preposition to use with  drugstores