disregard vs ignorance

disregard

noun
  • The act or state of deliberately not paying attention or caring about; misregard. 

verb
  • To ignore; pay no attention to. 

ignorance

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

  • Sins committed through ignorance. 

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