exhaust vs sluice box

exhaust

noun
  • The dirty air let out of a room through a register or pipe provided for the purpose. 

  • An exhaust pipe, especially on a motor vehicle. 

  • A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system. 

  • The steam let out of a cylinder after it has done its work there. 

  • exhaust gas. 

verb
  • To empty by drawing or letting out the contents 

  • To bring out or develop completely 

  • To discuss thoroughly or completely 

  • To subject to the action of various solvents in order to remove all soluble substances or extractives 

  • To draw or let out wholly; to drain off completely (:liquid) 

  • to tire out; to wear out; to cause to be without any energy 

  • To use up; to deplete, drain or expend wholly, or until the supply comes to an end 

sluice box

noun
  • A box with riffles along the bottom, used to trap heavier gold particles as water washes them and the other material along the box. 

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