halting vs immobilization

halting

noun
  • The action of one who halts; a stopping or hesitancy. 

adj
  • Prone to pauses or breaks; hesitant; broken. 

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 halting and immobilization occurred in a corpus of books? (source: Google Ngram Viewer )