epideictic vs rhetorical

epideictic

adj
  • Of or pertaining to rhetoric of ceremony, declamation, and demonstration, most often the rhetoric of funerals and other formal events. One of the three branches, or "species" (eidē), of rhetoric as outlined by Aristotle. 

rhetorical

adj
  • Part of or similar to rhetoric, the use of language as a means to persuade. 

  • Not earnest, or presented only for the purpose of an argument. 

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