Which preposition to use with impolicy

of Occurrences 64%

The impolicy of privateers, and of letters of marque and reprisals, is next animadverted on, by the story of two neighbours, who are at variance, and whose dependants are occupied in laying hold of what they can of each other's flocks and herds, and doing as much mischief as possible, by which both parties, of necessity, suffer.

as Occurrences 2%

At this meeting I read a paper, giving an account of the light I had collected in the course of my inquiries, with observations as well on the impolicy as on the wickedness of the trade.

Which preposition to use with  impolicy