sawbuck vs sawhorse

sawbuck

noun
  • A framework for holding wood so that it can be sawed; a sawhorse. 

  • A ten-dollar bill. 

sawhorse

noun
  • A structure with a crosspiece used to support timber or other material for working. 

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