aseptic vs cathartic

aseptic

adj
  • pasteurised. 

  • Free of disease-causing microbes. 

  • Used to protect against infection by disease-causing microbes. 

cathartic

adj
  • Purgative; inducing mental or physical catharsis. 

  • That which releases emotional tension, especially after an overwhelming experience. 

noun
  • A laxative. 

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