baffle vs gearbox

baffle

noun
  • A lever for operating the throttle valve of a winding engine. 

  • An architectural feature designed to confuse enemies or make them vulnerable. 

  • A device used to dampen the effects of such things as sound, light, or fluid. Specifically, a baffle is a surface which is placed inside an open area to inhibit direct motion from one part to another, without preventing motion altogether. 

verb
  • To struggle in vain. 

  • To bewilder completely; to confuse or perplex. 

gearbox

noun
  • That part of a car's transmission containing the train of gears, and to which the gear lever is connected. 

  • An enclosed gear train. 

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