ambulant vs migratory

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. 

migratory

adj
  • Roving; wandering; nomadic. 

  • Migrating. 

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