primal vs requisite

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. 

noun
  • A primal cut (of meat). 

verb
  • To take part in primal therapy. 

requisite

adj
  • Essential, indispensable, required. 

noun
  • An indispensable item; a requirement. 

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