Which preposition to use with milkwoman

at Occurrences 1%

Bridget (May), the milkwoman at Falkland Castle.

with Occurrences 1%

I thought the Frankfort milkwomen with their donkeys and hearse-like carts, were comical objects enough, but they bear no comparison with these Bohemian turn-outs.

Which preposition to use with  milkwoman