jibber-jabber vs whiff-whaff

jibber-jabber

noun
  • Excessive or meaningless talk. 

whiff-whaff

noun
  • Unnecessary items or additions. 

  • The breathy sound of something rushing quickly; whoosh. 

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