gobbledygook vs pleonasm

gobbledygook

noun
  • Nonsense; meaningless or encrypted language. 

  • Something written in an overly complex, incoherent, or incomprehensible manner. 

pleonasm

noun
  • Redundancy in wording. 

  • A phrase involving pleonasm; a phrase containing one or more words which are redundant because their meaning is expressed elsewhere in the phrase. 

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