cathartic vs sanitary

cathartic

adj
  • Purgative; inducing mental or physical catharsis. 

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

noun
  • A laxative. 

sanitary

adj
  • Of, or relating to health. 

  • Clean and free from pathogens; hygienic. 

noun
  • Sanitary towel. 

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