ignorance vs illiteracy

ignorance

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

  • Sins committed through ignorance. 

illiteracy

noun
  • Unlearnedness; the state of being ignorant or unlettered. 

  • The portion of a population unable to read and write, generally given as a percentage. 

  • A word, phrase, or grammatical turn thought to be characteristic of an illiterate person. 

  • The inability to read and write. 

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