reorientation vs upheaval

reorientation

noun
  • The act of changing the direction of something. 

  • A new orientation. 

upheaval

noun
  • Disruptive change, from one state to another. 

  • A sudden violent upset, disruption or convulsion. 

  • The process of being heaved upward, especially the raising of part of the earth's crust. 

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