mackinaw vs paperbelly lean

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. 

paperbelly lean

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