Which preposition to use with charlatanism

in Occurrences 2%

They increase yearly, almost daily, and their achievements, in spite of an uncritical enthusiasm in some quarters and a semi-charlatanism in others, have been and continue magnificent.

at Occurrences 1%

But he had attracted so much notice by his pretended story of being about the person of Napoleon, that he was of too much importance to be passed by: I did not, indeed, know as much of this fellow's Charlatanism at that time as afterwards, when I saw him confronted with a blacksmith of La Belle Alliance, who had been his companion in a hiding-place, ten miles from the field, during the whole day; a fact which he could not deny.

with Occurrences 1%

I will tear away the veil of charlatanism with which you have enveloped yourself.

Which preposition to use with  charlatanism