aphorism vs self-evidency

aphorism

noun
  • A concise, terse, laconic, or memorable expression of a general truth or principle. 

verb
  • To speak or write aphorisms. 

self-evidency

noun
  • The condition, fact, or quality of being self-evident. 

How often have the words aphorism and self-evidency occurred in a corpus of books? (source: Google Ngram Viewer )