fume hood vs thimble

fume hood

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

thimble

noun
  • A socket in machinery shaped like a thimble. 

  • As much as fills a thimble (sense 1); a thimbleful. 

  • A metal ring which a cable or rope intended for attaching to other things is looped around as a protection against chafing. 

  • A pitted, now usually metal, cup-shaped cap worn on the tip of a finger, which is used in sewing to push the needle through material. 

  • A thimble or similar object used in thimblerig (“a game of skill which requires the bettor to guess under which of three thimbles or small cups a pea-sized object has been placed after the person operating the game rapidly rearranges them”). 

  • A ring- or tube-shaped component such as a ferrule. 

verb
  • To sew. 

  • To use a thimble (noun sense 1). 

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