descendant vs infant

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. 

infant

noun
  • A very young human being, from conception to somewhere between six months and two years of age after birth, needing almost constant care and attention. 

  • A minor. 

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