Which preposition to use with businessman

for Occurrences 2%

An Lu-shan, too, had been a businessman for a while.

in Occurrences 1%

The most important single factor in this connection was the development of a class of businessmen in a society dominated by landlords, churchmen and soldiers.

to Occurrences 1%

This shift gained impetus with the end of American economic aid, which had tied local businessmen to American industry and thus worked to the advantage of mainland Chinese, for these had contacts in the United States, whereas the Taiwan-Chinese had contacts only in Japan.

Which preposition to use with  businessman