innocence vs subterfuge

innocence

noun
  • Absence of responsibility for a crime, tort, etc. 

  • Lack of ability or intention to harm or damage. 

  • Lack of understanding about sensitive subjects such as sexuality and crime. 

subterfuge

noun
  • An indirect or deceptive device or stratagem; a blind. Refers especially to war and diplomatics. 

  • Deception; misrepresentation of the true nature of an activity. 

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