Which preposition to use with businesslike

in Occurrences 5%

Prince Semionicz was most prompt and businesslike in his dealings.

as Occurrences 2%

Standing straight up and trying to look as businesslike as a wartfrog can possibly look, he said, "That is the exact price I planned to ask for a very pretty unicorn that I have recently acquired by perfectly legitimate means.

Which preposition to use with  businesslike