gallop vs ictus

gallop

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

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

  • An act or instance of going or running rapidly. 

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. 

ictus

noun
  • The pulse. 

  • A sudden attack, blow, stroke, or seizure, as in a sunstroke, the sting of an insect, pulsation of an artery, etc. 

  • The stress of voice laid upon an accented syllable of a word. Compare arsis. 

  • In conducting, the indication of a musical event, most often the beat of the tempo or the entry of a section of the orchestra. 

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