ignorance vs unfamiliarity

ignorance

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

  • Sins committed through ignorance. 

unfamiliarity

noun
  • Lack of familiarity; ignorance or inexperience. 

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