pavee vs wanderer

pavee

noun
  • A traveller, a member of Ireland's nomadic ethnic minority. 

wanderer

noun
  • One who wanders, who travels aimlessly. 

  • Any of various far-migrating nymphalid butterflies of the genus Danaus. 

  • The wandering albatross, Diomedea exulans. 

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