immobility vs stableness

immobility

noun
  • The quality of not moving. 

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

stableness

noun
  • The quality or state of being stable, or firmly established; stability. 

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