nonprofessional vs tenderfoot

nonprofessional

noun
  • One who is not a professional; an amateur. 

adj
  • not professional; amateur 

tenderfoot

noun
  • An inexperienced person; a novice. 

  • A newcomer or arriviste to the region in the American frontier (Old West and Wild West). 

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