diaphoretic vs sweltering

diaphoretic

adj
  • Generating sweat or perspiration. 

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

sweltering

adj
  • hot and humid; oppressively sticky 

noun
  • The situation of being or feeling hot and humid. 

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