itinerant vs nomadic

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. 

nomadic

adj
  • Of or related to any habitually wandering person or animal. 

  • Of or related to itinerant herdsmen. 

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