sympathizer vs well-wisher

sympathizer

noun
  • A person who sympathizes (with a political cause, a side in a conflict, etc.); a supporter. 

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 sympathizer and well-wisher occurred in a corpus of books? (source: Google Ngram Viewer )