facticity vs sincerity

facticity

noun
  • The quality or state of being a fact. 

  • In existentialism, the state of being in the world without any knowable reason for such existence, or of being in a particular state of affairs which one has no control over. 

  • A fact that is not changeable or that is assumed to be true without further evaluation. 

sincerity

noun
  • The quality or state of being sincere 

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