jockey vs leadfoot

jockey

noun
  • One who rides racehorses competitively. 

  • A rapist. 

  • An operator of some machinery or apparatus. 

  • A prostitute's client. 

  • That part of a variable resistor or potentiometer that rides over the resistance wire 

  • The selling of an unsound horse for a sound price is regarded by a Yorkshire jockey 

verb
  • To cheat or trick. 

  • To jostle by riding against. 

  • To maneuver (something) by skill for one's advantage. 

  • To ride (a horse) in a race. 

leadfoot

noun
  • A driver who does not compensate the throttle position of the vehicle for road conditions or terrain, invariably slowing down while going uphill and speeding up while going downhill. 

  • One who drives quickly or without subtlety, one who often engages in and/or is fond of slamming and flooring the accelerator often. 

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