gabbling vs gibberish

gabbling

noun

  • Rapid, confused speech. 

gibberish

noun

  • Speech or writing that is unintelligible, incoherent or meaningless. 

  • Needlessly obscure or overly technical language. 

  • A language game, comparable to pig Latin, in which one inserts a nonsense syllable before the first vowel in each syllable of a word. 

adj

  • unintelligible, incoherent or meaningless 

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