cabriolet vs rickshaw

cabriolet

noun
  • A light two- or four-wheeled carriage with a folding top, pulled by a single horse. 

  • An automobile with a retractable top. 

rickshaw

noun
  • A two-wheeled carriage pulled along by a person. 

verb
  • To move someone by means of a rickshaw. 

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