asyndeton vs polysyndeton

asyndeton

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

polysyndeton

noun
  • The use of many conjunctions to achieve an overwhelming effect in a sentence. 

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