concertina vs throttle

concertina

noun
  • Coiled barbed wire for use as an obstacle. 

  • A type of booklet label, consisting of up to 32 pages of booklet as an insert. 

  • Something resembling a concertina, such as a folded book, a bus door or a set of picture frames that are folded together. 

  • A musical instrument, like the various accordions, that is a member of the free-reed family of musical instruments, typically having buttons on both ends. 

verb
  • to be drawn closer and farther apart repeatedly, or up and down, as if situated on a working concertina's folds 

  • to become compressed into a shape reminiscent of a concertina 

throttle

noun
  • The lever or pedal that controls this valve. 

  • A valve that regulates the supply of fuel-air mixture to an internal combustion engine and thus controls its speed; a similar valve that controls the air supply to an engine. 

verb
  • To utter with breaks and interruption, in the manner of a person half suffocated. 

  • To have the throat obstructed so as to be in danger of suffocation; to choke; to suffocate. 

  • To control or adjust the speed of (an engine). 

  • To breathe hard, as when nearly suffocated. 

  • To cut back on the speed of (an engine, person, organization, network connection, etc.). 

  • To strangle or choke someone. 

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