spiracle vs stew

spiracle

noun
  • A pore or opening used (especially by arthropods and some fish) for respiration. 

  • Any small aperture or vent for air or other fluid. 

  • The blowhole of a whale, dolphin or other similar species. 

stew

noun
  • A pool in which fish are kept in preparation for eating. 

  • A heated bath-room or steam-room; also, a hot bath. 

  • A dish cooked by stewing. 

  • A state of agitated excitement, worry, and/or confusion. 

  • A steward or stewardess on an airplane or boat. 

  • An artificial bed of oysters. 

verb
  • To brew (tea) for too long, so that the flavour becomes too strong. 

  • To suffer under uncomfortably hot conditions. 

  • To cook (food) by slowly boiling or simmering. 

  • To be in a state of elevated anxiety or anger. 

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