boxcar vs charabanc

boxcar

noun
  • An enclosed railway goods wagon, typically with a sliding door. 

verb
  • To reduce to a boxcar function. 

charabanc

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

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

verb
  • To travel or convey by charabanc. 

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