Which preposition to use with incoherencies

of Occurrences 4%

It is doubtless from a suspicion, more or less obscure, of the incoherency of their purpose, that such committees usually fall into the hands of a "practical man,"that is, a man impassive to principles, of hardihood or bluntness of perception enough to carry into effect their vague fancies, and spare them from coming face to face with their inconsistencies.

from Occurrences 1%

But she found herself staring blankly into the darkness and her thoughts ranging in a shuttle play of incoherency from the moment that Leddy had approached her on the pass till a stranger, whom she never expected to see again, walked away into the night.

like Occurrences 1%

She broke an awkward silence, saying, very faint and pallid: 'It is the day!' 'Iperhaps' I said, or some incoherency like that.

on Occurrences 1%

Johnnie turned contemptuously and left the woman babbling incoherencies on her knees, evidently preparing to pray to a God whose laws she was determined to break.

Which preposition to use with  incoherencies