forester vs lumberjack

forester

noun
  • A person who practices forestry. 

  • A moth in the family Zygaenidae. 

  • Any of various nymphalid butterflies of the genus Lethe. Other members of this genus are called tree browns and wood browns. 

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 forester and lumberjack occurred in a corpus of books? (source: Google Ngram Viewer )