incumbent vs primal

incumbent

adj
  • Prevalent, prevailing, predominant. 

  • Lying; resting; reclining; recumbent. 

  • Being the current holder of an office or a title. 

  • Imposed on someone as an obligation, especially due to one's office. 

  • Resting on something else; in botany, said of anthers when lying on the inner side of the filament, or of cotyledons when the radicle lies against the back of one of them 

  • Bent downwards so that the ends touch, or rest on, something else. 

noun
  • The current holder of an office, such as ecclesiastical benefice or an elected office. 

  • A holder of a position as supplier to a market or market segment that allows the holder to earn above-normal profits. 

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 incumbent and primal occurred in a corpus of books? (source: Google Ngram Viewer )