Which preposition to use with instructress

in Occurrences 3%

I was to be their instructress in action and in attitudes, and to receive their praises and their admiration of my theatrical genius.

at Occurrences 1%

"Madame La Vigne," he said, rising ceremoniously, "permit me to introduce to you Miss Miriam Harz," reading the name slowly from the card again, which he took from the wall, "'a candidate for the position of instructress at Beauseincourt.

for Occurrences 1%

One evening, the bottles circulating, they mentioned one Dolly, goddess at some bar, as a fit instructress for him.

to Occurrences 1%

He handles this grand themeeleythheroys eleythherôs philosopheininvolving as it does the best interests of philosophy, as an instructress to men's judgments, and a stimulus to their intelligencewith great depth of psychological analysis sustained by abundant historical illustration.

Which preposition to use with  instructress