diaphoretic vs sudation

diaphoretic

noun
  • A product or agent which induces or promotes perspiration. 

adj
  • Generating sweat or perspiration. 

sudation

noun
  • The process of perspiring. 

  • Perspiration; sweat (fluid). 

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