enervation vs indolence

enervation

noun
  • State of being enervated; debility. 

  • Act of enervating; debilitation. 

indolence

noun
  • Habitual laziness or sloth. 

  • Lack of pain in a tumour. 

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