broncobuster vs gaucho

broncobuster

noun
  • A person who breaks horses so that they can be ridden with a saddle. 

gaucho

noun
  • A cowboy of the South American pampas. 

  • A proposed currency intended to be used by Argentina and Brazil to make interregional payments. 

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