Which preposition to use with exculpations

of Occurrences 4%

After so generous an exculpation of the American people from any desire to pull their own house about their ears, we are left to conclude that the only real danger to be apprehended, in case of a Republican success, is a de facto and de jure dissolution of that union between certain placemen and their places which has lasted so long that they have come to look on it as something Constitutional.

from Occurrences 3%

They made habit and bad example almost a sufficient exculpation from crime.

for Occurrences 1%

I always had to reply, when they got down upon their knees to me, and squeezed my hands, that I could not force my sensations; and though I should ever esteem them as friends, I could not change my condition of maiden meditation and exculpation for the agitation of matrimonial engagements.

Which preposition to use with  exculpations