soft-soap vs tempt

soft-soap

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

noun
  • Persuasion by means of flattery or pleasing words. 

tempt

verb
  • To provoke someone to do wrong, especially by promising a reward; to entice. 

  • To attract; to allure. 

  • To provoke something; to court. 

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