Which preposition to use with prinks

at Occurrences 2%

I don't believe I talked just so; but the fact is, in reporting one's conversation, one cannot help Blair-ing it up more or less, ironing out crumpled paragraphs, starching limp ones, and crimping and plaiting a little sometimes; it is as natural as prinking at the looking-glass.]

before Occurrences 1%

[She rises and prinks before the mirror.

Which preposition to use with  prinks