pavee vs rolling stone

pavee

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

rolling stone

noun
  • A person who moves around a lot and never settles down; a vagrant. 

  • A geological phenomenon where rocks move and inscribe long tracks along a smooth valley floor without animal or human intervention. 

  • A meteoroid. 

  • A womanizer. 

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