grandiloquence vs rhetoric

grandiloquence

noun
  • Lofty, pompous or bombastic speech or writing. 

rhetoric

noun
  • Meaningless language with an exaggerated style intended to impress. 

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

adj
  • Synonym of rhetorical. 

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