Which preposition to use with purgation

in Occurrences 2%

His discourse is vomit, and his ignorance the strongest purgation in the world.

of Occurrences 2%

"Tragedy," he says, "is an imitation of an action ... through pity and fear effecting the proper purgation of these emotions."

after Occurrences 1%

They condemned the Romish doctrine of Purgatory, with its popular tenet of material firedid that exclude every doctrine of purgation after death?

for Occurrences 1%

Jaques, donnez-vous un fort gentil purgation for Monsieur Burgess.

per Occurrences 1%

I have considered of the crasis and syntoma of your disease, and here is un fort gentil purgation per evacuationem excrementorum, as we physicians use to parley.

to Occurrences 1%

Those very words are a purgation to me.

Which preposition to use with  purgation