expressivity vs rhetoric

expressivity

noun
  • The quality of being expressive. 

  • The degree to which a gene affects or can affect an organism. 

rhetoric

noun
  • The art of using language, especially public speaking, as a means to persuade. 

  • Meaningless language with an exaggerated style intended to impress. 

adj
  • Synonym of rhetorical. 

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