insipidity vs self-evidency

insipidity

noun
  • The condition of being insipid; insipidness. 

  • Something that is insipid; an insipid utterance, sight, object, etc. 

self-evidency

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

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