itinerant vs on foot

itinerant

adj
  • Habitually travelling from place to place. 

noun
  • A member of the Travelling Community, whether settled or not. 

  • One who travels from place to place. 

on foot

prep
  • In progress or in preparation; active, in operation. 

  • On one's feet; walking, jogging or running but not in a vehicle or on the back of an animal. 

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