whiff-whaff vs word salad

whiff-whaff

noun
  • Unnecessary items or additions. 

  • The breathy sound of something rushing quickly; whoosh. 

word salad

noun
  • An intentionally nonsensical and voluminous statement. 

  • Meaningless text generated by a computer. 

  • A nonsensical assemblage of words, typical of schizophrenia, Wernicke's aphasia, and some other mental disorders. 

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