ambulant vs immobile

ambulant

adj
  • Able to walk. 

  • Designed for use by somebody with a disability that impairs, but does not prevent, walking. 

noun
  • A patient who is able to walk. 

immobile

adj
  • fixed, unable to be moved 

  • not mobile, not movable 

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