peroration vs spiel

peroration

noun
  • A discourse or rhetorical argument in general. 

  • The concluding section of a discourse, either written or oral, in which the orator or writer sums up and commends his topic to his audience, particularly as used in the technical sense of a component of ancient Roman oratorical delivery. 

spiel

noun
  • A lengthy and extravagant speech or argument usually intended to persuade. 

  • A game of curling. 

  • An early form of rap music. 

verb
  • To give a sales pitch; to promote by speaking. 

  • To talk at length. 

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