push-up vs shackle

push-up

verb
  • To perform a push-up, or to lift oneself off the ground in a push-up-like manner. 

noun
  • An exercise done to improve upper body strength, performed by resting on one's toes and hands and pushing one's weight off the floor. 

  • A push-up bra. 

adj
  • Supporting the breasts to increase their apparent size. 

  • Designed to be worn rolled up. 

shackle

verb
  • To render immobile or incapable; to inhibit the progress or abilities of. 

  • To shake, rattle. 

  • To restrain using shackles; to place in shackles. 

noun
  • A link for connecting railroad cars; a drawlink or draglink. 

  • A restraint on one's action, activity, or progress. 

  • A length of cable or chain equal to 12+¹⁄₂ fathoms or 75 feet, or later to 15 fathoms. 

  • A U-shaped piece of metal secured with a pin or bolt across the opening, or a hinged metal loop secured with a quick-release locking pin mechanism. 

  • A fetter-like band worn as an ornament. 

  • A restraint fit over a human or animal appendage, such as a wrist, ankle or finger; normally used in pairs joined by a chain. 

How often have the words push-up and shackle occurred in a corpus of books? (source: Google Ngram Viewer )