ravages vs spoliation

ravages

noun
  • Harsh damage. 

spoliation

noun
  • The intentional destruction of or tampering with (a document) in such way as to impair evidentiary effect. 

  • Robbery or plunder in times of war; especially, the authorized act or practice of plundering neutrals at sea. 

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