Which preposition to use with overturnings

of Occurrences 18%

The vital problem of municipal reform is not the shattering of the ring, the overturning of the boss, the gagging of a few loud tongues.

at Occurrences 4%

The opposers of abolitionists fully believe this; one of them remarked to me not long since, there is no doubt there will be a most terrible overturning at the South in a few years, such cruelty and wrong, must be visited with Divine vengeance soon.

in Occurrences 1%

That would mean, of course, a tremendous overturning in the business of the world; a radical revision of the ideals and standards of the great majority; a new point of view and a new aim in life for the most of us.

Which preposition to use with  overturnings