quench vs sit on

quench

verb
  • To terminate or greatly diminish (a chemical reaction) by destroying or deforming the remaining reagents. 

  • To satisfy, especially a literal or figurative thirst. 

  • To rapidly change the parameters of a physical system. 

  • To cool rapidly by direct contact with liquid coolant, as a blacksmith quenching hot iron. 

  • To extinguish or put out (as a fire or light). 

  • To rapidly terminate the operation of a superconducting electromagnet by causing part or all of the magnet's windings to enter the normal, resistive state. 

noun
  • The abnormal termination of operation of a superconducting magnet, occurring when part of the superconducting coil enters the normal (resistive) state. 

  • A rapid change of the parameters of a physical system. 

  • The act of quenching something; the fact of being quenched. 

sit on

verb
  • To block, suppress, restrain. 

  • To take no action on; to hold in reserve without actually using. 

  • To hold an official inquiry regarding; to deliberate about. 

  • To be a member of. 

  • Used other than figuratively or idiomatically: see sit, on. 

  • To restrain (a person). 

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