playmate vs well-wisher

playmate

noun
  • A person's lover. 

  • A female who has appeared as the centerfold in Playboy magazine. 

  • A companion for someone (especially a child) to play with. 

well-wisher

noun
  • Someone who extends good wishes, or expresses sympathy, to someone else. 

  • Someone who makes a wish at a wishing well. 

How often have the words playmate and well-wisher occurred in a corpus of books? (source: Google Ngram Viewer )