ignorance vs perspicacity

ignorance

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

  • Sins committed through ignorance. 

perspicacity

noun
  • The human faculty or power to mentally grasp or understand clearly. 

  • Acute discernment or understanding; insight. 

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