immobilization vs squashing

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. 

squashing

noun
  • The act by which something is squashed; a pressing. 

adj
  • Belittling. 

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