chalk talk vs spiel

chalk talk

noun
  • A music hall act in which a performer makes chalk caricatures whilst reciting a monologue 

  • An informal lecture on an academic subject. 

spiel

noun
  • An early form of rap music. 

  • A game of curling. 

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

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

  • To talk at length. 

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