epideictic vs oratorical

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. 

oratorical

adj
  • of, or relating to oratory or an orator. 

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