amuse vs butter someone's biscuit

amuse

verb
  • To entertain or occupy (someone or something) in a pleasant manner; to stir (an individual) with pleasing emotions. 

  • To cause laughter or amusement; to be funny. 

butter someone's biscuit

verb
  • To interest or appeal to someone; to make someone happy. 

How often have the words amuse and butter someone's biscuit occurred in a corpus of books? (source: Google Ngram Viewer )