adumbration vs antistrophe

adumbration

noun
  • A rough or symbolic representation; a vague indication of what is to come, a foreshadowing. 

  • The state of being in shadow or shade; (countable) a shadow. 

  • The outline of a charge (“image displayed on an escutcheon”), sometimes filled in with a darker shade than the field. 

  • The form of an object as seen by an observer. 

  • A faint sketch; a brief representation, an outline. 

antistrophe

noun
  • The retort or turning of an adversary's plea against him. 

  • The lines of this part of the choral song. 

  • The repetition of a word or phrase at the end of successive clauses 

  • In Greek choruses and dances, the returning of the chorus, exactly answering to a previous strophe or movement from right to left. 

  • The repetition of words in an inverse order. 

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