artisan vs roustabout

artisan

noun
  • A skilled manual worker who uses tools and machinery in a particular craft. 

  • A person who displays great dexterity. 

adj
  • artisanal 

roustabout

noun
  • an unskilled laborer, especially at an oilfield, at a circus or on a ship, 19th c. 

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