gibberish vs insoluble

gibberish

adj
  • unintelligible, incoherent or meaningless 

noun
  • Needlessly obscure or overly technical language. 

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

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

insoluble

adj
  • That cannot be explained; mysterious or inexplicable. 

  • That cannot be dissolved. 

  • That cannot be solved; unsolvable; insolvable. 

  • That cannot be broken down or dispersed. 

noun
  • Any substance that cannot be dissolved. 

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