Which preposition to use with cherishings

of Occurrences 7%

The special means by which this shall be accomplished we leave to the care of the gentlemen abovenamed, and their compeersmerely putting in one word for gentle exercise, and two words for the cherishing of mental health, the expulsion of morbid excitements, assume what guise they may.

in Occurrences 1%

At a Crêche in Notting Hill I watched, the other day, some of this cherishing in progress, and it was a pleasant and stimulating sight.

through Occurrences 1%

One woman face had been wholly mine for hidden cherishing through all the years.

Which preposition to use with  cherishings