disaffection vs severance

disaffection

noun
  • Alienation; loss of loyalty. 

  • Discontent; unrest. 

severance

noun
  • A separation. 

  • The act of severing or the state of being severed. 

  • A severance payment. 

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