firstborn vs primal

firstborn

adj
  • Most excellent; most distinguished or exalted. 

  • Born as the first one in a family, flock or the like. 

noun
  • The first child to be born to a parent or family. 

primal

adj
  • Of greatest importance; primary. 

  • Being the first in time or in history. 

  • Being one of the pieces of meat initially separated from the carcass during butchering, prior to division into smaller cuts. 

verb
  • To take part in primal therapy. 

noun
  • A primal cut (of meat). 

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