asyndeton vs oxymoron

asyndeton

noun
  • A stylistic scheme in which conjunctions such as "or" and "and" are deliberately omitted from a series of words, phrases, or clauses. 

oxymoron

noun
  • A figure of speech in which two words or phrases with opposing meanings are used together intentionally for effect. 

  • A contradiction in terms. 

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