bateau vs pirogue

bateau

noun
  • A small, flat-bottomed type of boat. 

pirogue

noun
  • A small flat-bottom boat of shallow draft. 

  • A canoe of shallow draft, made by hollowing a log. 

  • A boat-shaped food that is stuffed with seafood. 

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