plumbing vs windpipe

plumbing

noun
  • The pipes, together with the joints, tanks, stopcocks, taps, and other fixtures of a water, gas, or sewage system in a house or other building. 

  • A system of vessels or ducts in the human body, especially the genitourinary system. 

  • The trade or occupation of a plumber. 

  • Practical, concrete work serving to support other work. 

  • A Murasugi sum where each disk summed along has its boundary subdivided into four segments. 

windpipe

noun
  • Any duct for air or other gas. 

  • A section of road or bridleway which has a reputation for having strong crosswinds or localized wind swirls. 

  • The trachea. 

  • The anus. 

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