laowai vs whiteface

laowai

noun
  • A foreigner in mainland China or Taiwan, (particularly) a Western one. 

whiteface

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

  • A Hereford cow. 

  • Any bird of the genus Aphelocephala. 

  • Makeup that makes the face appear white. 

  • Any dragonfly of the genus Leucorrhinia. 

  • A traditional clown who ranks above the auguste. 

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