descendant vs grandfather

descendant

noun
  • One of the progeny of a specified person, at any distance of time or through any number of generations. 

  • A language that is descended from another. 

  • A word or form in one language that is descended from a counterpart in an ancestor language. 

  • A later evolutionary type. 

  • A thing that derives directly from a given precursor or source. 

adj
  • Proceeding from a figurative ancestor or source. 

  • Descending; going down 

  • Descending from a biological ancestor. 

grandfather

noun
  • A father of someone's parent. 

  • A male forefather. 

  • The archived older version of a file that immediately preceded the father file. 

verb
  • To retain discontinued laws or rules for (a thing, person or organization previously affected by them). 

  • To be, or act as, a grandfather to. 

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