prattle vs whiff-whaff

prattle

noun
  • Silly, childish talk; babble. 

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

whiff-whaff

noun
  • The breathy sound of something rushing quickly; whoosh. 

  • Unnecessary items or additions. 

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