exigency vs juncture

exigency

noun
  • An urgent situation, one requiring extreme effort or attention. 

  • The demands or requirements of a situation. 

juncture

noun
  • A critical moment in time. 

  • A place where things join, a junction. 

  • The manner of moving (transition) or mode of relationship between two consecutive sounds; a suprasegmental phonemic cue, by which a listener can distinguish between two otherwise identical sequences of sounds that have different meanings. 

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