feller vs logger

feller

noun
  • A machine for felling trees. 

  • A person who fells a seam. 

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

  • A person who fells trees; a lumberjack 

logger

noun
  • A worker whose occupation is to harvest trees. 

  • That which logs, such as a computer program to keep track of events. 

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