doghouse vs fume hood

doghouse

noun
  • A structure of small size, similar to a doghouse, but offering useful shelter for a human. 

  • Any small house or structure or enclosure used to house a dog. 

  • A difficult or demoralizing situation. 

  • Any shabby or disreputable establishment. 

  • Mechanically, an equipment cover with an opening, with a shape resembling a doghouse. 

  • A traffic signal with five sections: two on the bottom, two in the middle, and one on top. 

fume hood

noun
  • A ventilated compartment in which chemical procedures may be undertaken without the escape of noxious fumes into the local environment. 

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