Which preposition to use with inflexibility

of Occurrences 28%

"Where now," she asked, "was the sternness and inflexibility of ancient story?

in Occurrences 3%

With this evidence of hostile inflexibility in trampling on rights which no independent nation can relinquish, Congress will feel the duty of putting the United States into an armor and an attitude demanded by the crisis, and corresponding with the national spirit and expectations.

from Occurrences 1%

For my own part, I am persuaded that it can only be by striking off something of inflexibility from his system, and something of pedantry from the common one, that we can expect to furnish a medium, equally congenial to the elegance of civilization, and the manliness of virtue.

without Occurrences 1%

We want them to cultivate energy without impatience, activity without restlessness, inflexibility without ill-humour.

Which preposition to use with  inflexibility