immobility vs immobilization

immobility

noun
  • The quality of not moving. 

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

immobilization

noun
  • The act or process of preventing a thing from moving. 

  • The process in which organic soil matter is decomposed and absorbed by microorganisms, and thus not available to plants. 

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