ambulant vs perambulatory

ambulant

adj

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

  • Able to walk. 

noun

  • A patient who is able to walk. 

perambulatory

adj

  • Relating to perambulation. 

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