asyndeton vs expunction

asyndeton

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

expunction

noun
  • The act of expunging or erasing. 

  • The condition of being expunged. 

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