downfall vs labefaction

downfall

noun
  • The cause of such a fall; a critical blow or error. 

  • A precipitous decline in fortune; death or rapid deterioration, as in status or wealth. 

  • An act of falling down. 

verb
  • To fall down; deteriorate; decline. 

labefaction

noun
  • The act of shaking or weakening or the resulting state; overthrow, ruination. 

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