sclera vs whiteface

sclera

noun
  • The white of the eye; the tough outer coat of the eye that covers the eyeball except for the cornea. 

whiteface

noun
  • Makeup that makes the face appear white. 

  • A person of European descent. (See usage notes.) 

  • A Hereford cow. 

  • Any bird of the genus Aphelocephala. 

  • Any dragonfly of the genus Leucorrhinia. 

  • A traditional clown who ranks above the auguste. 

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