mackinaw vs namaycush

mackinaw

noun
  • A flat-bottomed cargo boat; mackinaw boat. 

  • A heavy woolen cloth. 

  • A blanket made of wool, formerly distributed to the Amerindians by the U.S. government. 

namaycush

noun
  • The togue: a large North American lake trout, Salvelinus namaycush, usually spotted with red. 

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