amputation vs severance

amputation

noun
  • the loss of a limb, etc. through trauma 

  • surgical removal of all or part of a limb, etc. 

severance

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

  • A separation. 

  • A severance payment. 

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