aggravation vs pejoration

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. 

pejoration

noun
  • The act or process of becoming worse; worsening or degeneration. 

  • The process by which a word acquires a more negative meaning over time. 

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