Which preposition to use with straightforwardness

of Occurrences 5%

There is nothing flimsey, nor specious, nor whimsical in the place; evenness and harmony of proportion; simplicity and solidity of style, strength and straightforwardness of workmanship, strike you as its characteristics.

than Occurrences 2%

Mr. R. S. writes one of his peculiar letters, in which the sentiments seem to be compressed, as if some species of finesse were at workan attenuated worldly precaution which leads him perpetually to half conceal sentiment, purpose and acts, as if the operations and business of life were not ten times better effected by plain straightforwardness than by any other mode.

about Occurrences 1%

" I spoke lightly, but as a matter of fact I was some way from trusting Tommy's judgment implicitly with regard to Latimer's straightforwardness about the restaurant incident, and also about his visit to the hut.

by Occurrences 1%

Glahn, in Pan, apologizes for his uncouth straightforwardness by confessing that he is more at home in the woods, where he can say and do what he pleases without offence.

in Occurrences 1%

He was obliged to try to earn the money by leading the separatist intrigues in Kentucky, but it is doubtful if he ever had enough straightforwardness in him to be a thoroughgoing; villain.

Which preposition to use with  straightforwardness