loot vs sluice box

loot

noun
  • A scoop used to remove scum from brine pans in saltworks. 

  • Any valuable thing received for free, especially Christmas presents. 

  • Synonym of money. 

  • Synonym of booty, goods seized from an enemy by violence, particularly (historical) during the sacking of a town in war or (video games) after successful combat. 

  • Synonym of sack, the plundering of a city, particularly during war. 

verb
  • Synonym of rob, to steal something from someone by violence or threat of violence. 

  • Synonym of plunder, to seize by violence particularly during the capture of a city during war or (video games) after successful combat. 

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 loot and sluice box occurred in a corpus of books? (source: Google Ngram Viewer )