enervation vs slothfulness

enervation

noun
  • State of being enervated; debility. 

  • Act of enervating; debilitation. 

slothfulness

noun
  • The result or product of being slothful. 

  • The state or quality of being slothful. 

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