assay vs endgame

assay

noun
  • Trial by danger or by affliction; adventure; risk; hardship; state of being tried. 

  • Tested purity or value. 

  • Trial, attempt. 

  • The qualitative or quantitative chemical analysis of something. 

  • The act or process of ascertaining the proportion of a particular metal in an ore or alloy; especially, the determination of the proportion of gold or silver in bullion or coin. 

  • The alloy or metal to be assayed. 

  • Examination and determination; test. 

verb
  • To affect. 

  • To analyze or estimate the composition or value of (a metal, ore etc.). 

  • To attempt (something). 

  • To try tasting, as food or drink. 

endgame

noun
  • The final stage of an extended process or course of events, especially with the implication of the imminent realization of a masterful strategy or plan. 

  • The final stage of a game of chess, when there are few pieces left. 

  • The final stage of any game. 

  • The gameplay available in a massively multiplayer online role-playing game for players who have completed all of the preset challenges. 

  • The final stage of a game of bridge, when there are few cards left. 

adj
  • Having become canon by the end of the plot of a work of fiction or speculated to be intended to become such. 

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