immobility vs stagnation

immobility

noun
  • The quality of not moving. 

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

stagnation

noun
  • Inactivity. 

  • The state of being stagnant, without circulation. 

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