double talk vs prattle

double talk

noun
  • Speech which combines English (or some other language) and native-sounding gibberish for humorous effect. 

  • Doublespeak. 

  • Lies, especially in a formal political statement. 

  • A situation when two people talk at the same time, causing overlapping audio signals. 

  • A simple phonetic code with a regular infix that makes meaningful speech sound unintelligible. 

prattle

noun
  • Silly, childish talk; babble. 

verb
  • To speak incessantly and in an inconsequential or childish manner; to babble. 

How often have the words double talk and prattle occurred in a corpus of books? (source: Google Ngram Viewer )