jargon vs rhyming slang

jargon

noun
  • Speech or language that is incomprehensible or unintelligible; gibberish. 

  • A technical terminology unique to a particular subject. 

  • A language characteristic of a particular group. 

verb
  • To utter jargon; to emit confused or unintelligible sounds. 

rhyming slang

noun
  • Any system of slang in which a word is replaced with a phrase that rhymes with it; the rhyming word often being dropped. 

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