ignorance vs ingenuousness

ignorance

noun
  • The condition of being uninformed or uneducated; lack of knowledge or information. 

  • Sins committed through ignorance. 

ingenuousness

noun
  • The condition of being ingenuous. 

  • An ingenuous behavior. 

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