aftertale vs diatribe

aftertale

noun
  • Evil talk; slander; defamation. 

  • A postscript added where a story should end. 

  • A postscript added to the end of a story. 

diatribe

noun
  • An abusive, bitter, verbal attack or criticism: denunciation. 

  • A speech or writing which bitterly denounces something. 

  • A prolonged discourse. 

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