divarication vs trifurcation

divarication

noun
  • The point at which branching occurs. 

  • A divergence of opinion. 

  • The growth habit of some low-growing shrubs; with wide angles where they diverge, the branches may interlace. 

trifurcation

noun
  • A division into three branches. 

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