caster vs ratchet

caster

noun
  • A wheeled assembly attached to a larger object at its base to facilitate rolling. A caster usually consists of a wheel (which may be plastic, a hard elastomer, or metal), an axle, a mounting provision (usually a stem, flange, or plate), and sometimes a swivel (which allows the caster to rotate for steering). 

  • The angle of the axis around which a car's front wheels rotate when the steering wheel is turned, with a vertical axis being defined as zero caster. 

  • A shaker with a perforated top for sprinkling condiments such as sugar, salt, pepper, etc. 

  • A stand to hold a set of shakers or cruets. 

  • Someone or something that casts. 

verb
  • To act as a caster 

ratchet

noun
  • A pawl, click, or detent for holding or propelling a ratchet wheel, or ratch, etc. 

  • A noisemaker or musical instrument where sound is generated by a board striking against a rotating gear. See gragger, raganella. 

  • A procedure or regulation that goes in one direction, usually up. 

  • A ratchet wrench. 

  • A mechanism composed of a ratchet wheel, or ratch and pawl. 

verb
  • To increment or decrement. 

  • To cause to become incremented or decremented. 

adj
  • Ghetto; unseemly, indecorous. 

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