charabanc vs demonstrate

charabanc

verb
  • To travel or convey by charabanc. 

noun
  • A derisive term for a car, bus, train or other vehicle that is poor quality, slow or overcrowded. 

  • A horse-drawn, and then later, motorized omnibus with open sides, and often, no roof. 

demonstrate

verb
  • to show how to use (something). 

  • to show, display, or present; to prove or make evident 

  • to show the steps taken to create a logical argument or equation. 

  • to participate in or organize a demonstration. 

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