aggravating circumstance vs aggravation

aggravating circumstance

noun
  • A factor that increases the culpability or deleterious consequences of a wrongful act. 

aggravation

noun
  • The act of aggravating, or making worse; used of evils, natural or moral; the act of increasing in severity or heinousness; something additional to a crime or wrong and enhancing its guilt or injurious consequences. 

  • An extrinsic circumstance or accident which increases the guilt of a crime or the misery of a calamity. 

  • Provocation, irritation, annoyance. 

  • Exaggerated representation. 

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