gloss over vs sugarcoat

gloss over

verb
  • To treat something with less care than it deserves; to ignore. 

  • To cover up a mistake or a crime; to hush up or whitewash. 

sugarcoat

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

  • To coat with sugar. 

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