Which preposition to use with hibernation

of Occurrences 2%

He catalogues libraries, settles affairs in China, pronounces judgment on men who marry women superior to themselves, flouts popular liberty, hammers Swift unmercifully, and adds a few miscellaneous oracles, most of which are about as reliable as his knowledge of the hibernation of swallows.

by Occurrences 1%

It is a familiar fact that the bear supports life during hibernation by sucking his paws; but it may not be so generally known that the waste thus induced in the anterior extremities is restored by the moral consciousness of the animal that the fat he is so carefully hoarding is to confer a posthumous blessing on mankind.

Which preposition to use with  hibernation