logger vs lumberjack

logger

noun
  • A worker whose occupation is to harvest trees. 

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

lumberjack

noun
  • A person whose work is to fell trees. 

  • A lumberjacket. 

verb
  • To work as a lumberjack, cutting down trees. 

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