gullibility vs ignorance

gullibility

noun
  • The quality of readily believing information, truthful or otherwise, usually to an absurd extent. 

ignorance

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

  • Sins committed through ignorance. 

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