accidie vs enervation

accidie

noun
  • Sloth, slothfulness, especially as inducing general listlessness and apathy. 

enervation

noun
  • State of being enervated; debility. 

  • Act of enervating; debilitation. 

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