innocence vs onus

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. 

onus

noun
  • A legal obligation. 

  • Burden of proof, onus probandi. 

  • Stigma. 

  • Blame. 

  • Responsibility; burden. 

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