preach vs spiel

preach

verb
  • To teach or instruct by preaching; to inform by preaching. 

  • To proclaim by public discourse; to utter in a sermon or a formal religious harangue. 

  • To give a sermon. 

  • To advise or recommend earnestly. 

  • To give advice in an offensive or obtrusive manner. 

spiel

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

  • To talk at length. 

noun
  • A game of curling. 

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

  • An early form of rap music. 

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