feller vs lumberman

feller

noun
  • A person who fells trees; a lumberjack 

  • A person who fells a seam. 

  • A machine for felling trees. 

  • An appliance to a sewing machine for felling a seam. 

lumberman

noun
  • A man involved in the production or sale of lumber; a lumberjack or logger. 

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