bloodletting vs hecatomb

bloodletting

noun
  • A circumstance, such as a battle, where a large amount of blood is likely to be spilled through violence. 

  • The archaic practice of treating illness by removing some blood, believed to be tainted, from the stricken person. 

  • The diminishment of any resource with the hope that this will lead to a positive effect. 

hecatomb

noun
  • Any great sacrifice; a great number of people, animals or things, especially as sacrificed or destroyed; a large amount. 

  • A great feast and public sacrifice to the gods, originally of a hundred oxen. 

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