devastation vs vastation

devastation

noun
  • The act of devastating, or the state of being devastated; a laying waste. 

  • Waste or misapplication of the assets of a deceased person by an executor or administrator; devastavit. 

vastation

noun
  • Devastation, laying waste. 

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