butter someone's biscuit vs inveigle

butter someone's biscuit

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

inveigle

verb
  • To convert, convince, or win over with flattery or wiles. 

  • To obtain through guile or cunning. 

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