chimney vs duct

chimney

noun
  • A vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon- or hydrocarbon-based fuels); a flue. 

  • A narrow cleft in a rock face; a narrow vertical cave passage. 

  • A black eye; a shiner. 

  • The smokestack of a steam locomotive. 

  • The glass flue surrounding the flame of an oil lamp. 

  • A vagina. 

verb
  • To negotiate a chimney (narrow vertical cave passage) by pushing against the sides with back, feet, hands, etc. 

duct

noun
  • a pipe, tube or canal which carries gas or liquid from one place to another 

  • a vessel for conveying lymph or glandular secretions such as tears or bile 

  • a tube or elongated cavity (such as a xylem vessel) for conveying water, sap, or air 

  • a layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path 

  • an enclosure or channel for electrical cable runs, telephone cables, or other conductors 

verb
  • to enclose in a duct 

  • to channel something (such as a gas) or propagate something (such as radio waves) through a duct or series of ducts 

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