anticlimax vs aposiopesis

anticlimax

noun
  • An abrupt descent (either deliberate or unintentional) from the dignity of the idea which the speaker or writer appeared to be aiming for. 

  • An unsatisfying resolution to a narrative, usually owing to a deus ex machina or similarly trivial resolution of the main conflict. 

aposiopesis

noun
  • An abrupt breaking-off in speech, often indicated in print using an ellipsis (…) or an em dash (—). 

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