come-on vs sweetening

come-on

noun
  • A statement or sometimes action reflecting sexual or romantic interest. 

  • Something intended to attract, as in an advertisement. 

  • A bad actor whose talents do not extend far beyond walking onto the stage. 

sweetening

noun
  • The process of making something sweeter. 

  • A sweetener. 

How often have the words come-on and sweetening occurred in a corpus of books? (source: Google Ngram Viewer )