Which preposition to use with unthinkable

in Occurrences 3%

Here the great situation of the third act is brought about by a chain of coincidences which would be utterly unthinkable in the author's maturer work.

as Occurrences 1%

Whatever mitigation such a conception may offer, surely we may be excused for still adhering to that simpler explanation which involves a mystery indeed, but nothing so positively unthinkable as a process without a beginning.

by Occurrences 1%

when and what she pleases, is a thing unthinkable by the most improvident of statesmen.

during Occurrences 1%

The Epic of Rome, abandoned at the death of Caesar, unthinkable during the civil wars which followed, appealed for a hearing now that Rome was saved and the empire restored.

for Occurrences 1%

His death, to be sure, is unthinkable for such a man and does but testify to the unearthly attraction with which the girl is invested by Goethe's art.

to Occurrences 1%

The thing was almost unthinkable to me, and yet I was tempted to dwell upon it; for when a man is in loveand I could no longer disguise my condition from myselfhe is inclined to be humble and to gather up thankfully the treasure that is rejected of another.

Which preposition to use with  unthinkable