diatribe vs rhetoric

diatribe

noun
  • A prolonged discourse. 

  • A speech or writing which bitterly denounces something. 

  • An abusive, bitter, verbal attack or criticism: denunciation. 

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 diatribe and rhetoric occurred in a corpus of books? (source: Google Ngram Viewer )