artisan vs navvy

artisan

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

  • A person who displays great dexterity. 

adj
  • artisanal 

navvy

noun
  • A laborer on a civil engineering project such as a canal or railroad. 

verb
  • To carry out physical labor on a civil engineering project. 

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