aftertale vs slam piece

aftertale

noun
  • Evil talk; slander; defamation. 

  • A postscript added where a story should end. 

  • A postscript added to the end of a story. 

slam piece

noun
  • A journalistic or other treatment which portrays its subject in a highly unfavorable manner. 

  • A sexual partner to whom one has no particular emotional attachment. 

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