diaphoretic vs perspiration

diaphoretic

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

adj
  • Generating sweat or perspiration. 

perspiration

noun
  • The action or process of perspiring. 

  • Hard work. 

  • A saline fluid secreted by the sweat glands; sweat. 

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