primal vs substantive

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). 

substantive

adj
  • of the essence or essential element of a thing. 

  • Constituting the substance of content rather than its style, and thus always nontrivial. 

  • Of or pertaining to a substantive. 

  • actually and legally held, as distinct from an acting, temporary or honorary rank or appointment 

  • Having substance; enduring; solid; firm; substantial. 

  • applying to essential legal principles and rules of right. 

  • Depending on itself; independent. 

  • of a dye that does not need the use of a mordant to be made fast to that which is being dyed 

noun
  • Part of a text that carries the meaning, such as words and their ordering. 

verb
  • to make a word belonging to another part of speech into a substantive (that is, a noun) or use it as a noun 

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