frigid vs sweltering

frigid

adj
  • Very cold; lacking warmth; icy. 

  • Chilly in manner; lacking affection or zeal; impassive. 

  • Sexually unresponsive, especially of a woman. 

sweltering

adj
  • hot and humid; oppressively sticky 

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

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