Which preposition to use with unchivalrous

as Occurrences 1%

But of all the assembled spectators that day, an aggregation irresponsible, unchivalrous as no other rabble on eartha mob of the frontier,not one spoke to challenge their action, not one attempted to bar their way.

towards Occurrences 1%

I have said so much about the lack of chivalry shown by women to men that it is only reasonable to point out that the reverse is true, and that men are often extraordinarily unchivalrous towards women.

Which preposition to use with  unchivalrous