sugarcoat vs whiten

sugarcoat

verb
  • To make superficially more attractive; to give a falsely pleasant appearance to. 

  • To coat with sugar. 

whiten

verb
  • (To cause) to become white or whiter; to bleach or blanch. 

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