gypsy vs on foot

gypsy

adj
  • Of or having the qualities of an itinerant person or group with qualities traditionally ascribed to Romani people; making a living from dishonest practices or theft etc. 

verb
  • To roam around the country like a gypsy. 

  • To perform the gypsy step in contra dancing. 

noun
  • An itinerant person or any person, not necessarily Romani; a tinker, a traveller or a carny. 

  • A move in contra dancing in which two dancers walk in a circle around each other while maintaining eye contact (but not touching as in a swing). (Compare whole gyp, half gyp, and gypsy meltdown, in which this step precedes a swing.) 

  • A member of a Broadway musical chorus line. 

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 gypsy and on foot occurred in a corpus of books? (source: Google Ngram Viewer )