observable vs primal

observable

adj
  • Deserving to be observed; worth regarding; remarkable. 

  • Able to be observed. 

noun
  • Any physical property that can be observed and measured directly and not derived from other properties 

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. 

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