throttle vs traction

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. 

traction

noun
  • A mechanically applied sustained pull, especially to a limb. 

  • The condition of being so pulled. 

  • The extent of adoption of a new product or service, typically measured in number of customers or level of revenue achieved. 

  • Popular support. 

  • Collectively, the locomotives of a railroad, especially electric locomotives. 

  • The act of pulling something along a surface using motive power. 

  • The pulling power of an engine or animal. 

  • Grip. 

  • Scholarly interest and research. 

  • The adhesive friction of a wheel etc on a surface. 

verb
  • To apply a sustained pull to (a limb, etc.). 

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