collaboration vs ignorance

collaboration

noun
  • Treasonous cooperation. 

  • The act of collaborating. 

  • A production or creation made by collaborating. 

ignorance

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

  • Sins committed through ignorance. 

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