immobility vs slothfulness

immobility

noun
  • The quality of not moving. 

  • The state or condition of being unable to change one's location, move or be moved. 

slothfulness

noun
  • The state or quality of being slothful. 

  • The result or product of being slothful. 

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