clammy vs stifling

clammy

adj
  • The quality of normal skin signs, epidermis that is neither diaphoretic nor dry. 

  • Cold and damp, usually referring to hands or palms. 

stifling

noun
  • The act by which something is stifled. 

adj
  • The heat was stifling; it seemed hard to breathe and the exertion of rolling over on the bed seemed too much. 

  • That stifles. 

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