folk vs nephew

folk

noun
  • One’s relatives, especially one’s parents. 

  • People in general. 

  • The inhabitants of a region, especially the native inhabitants. 

  • A particular group of people. 

adj
  • Of or pertaining to common people as opposed to ruling classes or elites. 

  • Of or pertaining to the inhabitants of a land, their culture, tradition, or history. 

  • Of or related to local building materials and styles. 

  • Believed or transmitted by the common people; not academically correct or rigorous. 

nephew

noun
  • A son of one's cousin or cousin-in-law 

  • A son of one's sibling, brother-in-law, or sister-in-law; either a son of one's brother (fraternal nephew) or a son of one's sister (sororal nephew). 

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