forester vs sylviculturist

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. 

sylviculturist

noun
  • One who cultivates forest trees, especially as a business. 

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