soft-soap vs taffy

soft-soap

noun
  • Persuasion by means of flattery or pleasing words. 

verb
  • To attempt to persuade by flattery or pleasing words; to butter up. 

taffy

noun
  • Flattery. 

  • A soft, chewy candy made from boiled sugar, molasses, or corn syrup and butter. 

How often have the words soft-soap and taffy occurred in a corpus of books? (source: Google Ngram Viewer )