fiacre vs motorcycle

fiacre

noun
  • A small horse-drawn carriage for hire; a hackney carriage. 

motorcycle

noun
  • An open-seated motor vehicle with handlebars instead of a steering wheel, and having two (or sometimes three) wheels. 

verb
  • To ride a motorcycle. 

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