centralization vs juncture

centralization

noun
  • The act or process of centralizing, or the state of being centralized; the act or process of combining or reducing several parts into a whole 

juncture

noun
  • A place where things join, a junction. 

  • A critical moment in time. 

  • 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 centralization and juncture occurred in a corpus of books? (source: Google Ngram Viewer )