Which preposition to use with obduracy

of Occurrences 4%

But the paternal words were spoken in vain, and the legates also who were sent by the Pope to Constantinople were powerless to move the obduracy of the patriarch.

in Occurrences 1%

Your son is at perfect liberty to marry my mistress, since he has seen fit to desire it, and he shall do so, or repent his obduracy in the Bastille, where he will have time and leisure to learn the respect which he owes to his sovereign.

Which preposition to use with  obduracy