brille vs pair of eyeglasses

brille

noun
  • A transparent scale that covers the eye of a snake. Whenever the snake changes its skin in the act of ecdysis, the old brille gets shed as part of the old skin, the exuvia. 

pair of eyeglasses

noun
  • A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face. 

How often have the words brille and pair of eyeglasses occurred in a corpus of books? (source: Google Ngram Viewer )