blarney vs soft-soap

blarney

verb
  • To beguile with flattery. 

noun
  • Ability to talk constantly and fluently. 

  • Mindless chatter. 

  • Persuasive flattery or kind speech; smooth, wheedling talk. 

soft-soap

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

noun
  • Persuasion by means of flattery or pleasing words. 

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