Which preposition to use with betterments

of Occurrences 41%

All the week Father Shannon has shriven his people, who bring clean conscience to the betterment of appetite, and the Father sets them an example.

in Occurrences 5%

The fact remains that every dollar's worth of betterment in the country increases the value of city property one dollar, without effort to the owner.

for Occurrences 1%

"You are to have the patronage: we are to pay for all actual betterments for which vouchers can be shown at the close of the deal.

from Occurrences 1%

The important part played by the country at the Peace of Bucarest, and her detachment from Austria-Hungary, must necessarily have stimulated the national consciousness of the Transylvanians; while at the same time all hope for betterment from within must have ceased at the death of Archduke Francis Ferdinand, an avowed friend of the long-suffering nationalities.

over Occurrences 1%

" In fact Luke did present signs of a betterment over his first forlorn appearance on the circus scene.

Which preposition to use with  betterments