gallop vs retardation

gallop

noun
  • An act or instance of going or running rapidly. 

  • The fastest gait of a horse, a two-beat stride during which all four legs are off the ground simultaneously. 

  • An abnormal rhythm of the heart, made up of three or four sounds, like a horse's gallop. 

verb
  • To go rapidly or carelessly, as in making a hasty examination. 

  • To ride at a galloping pace. 

  • To make electrical or other utility lines sway and/or move up and down violently, usually due to a combination of high winds and ice accrual on the lines. 

  • To run very fast. 

  • To progress rapidly through the body. 

  • To run at a gallop. 

  • To cause to gallop. 

retardation

noun
  • The act of diminishing the rate of speed. 

  • The distance by which one wave is behind another. 

  • The extent to which anything is retarded; the result of any retarding or delay; mental, social, or physical slowness. 

  • Deceleration; reduction in the magnitude of velocity. 

  • That which retards; an obstacle; an obstruction. 

  • Extreme stupidity. 

  • A decrease in the speed of telegraph signalling. 

  • A suspension which resolves upwards. 

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