afterword vs closing form

afterword

noun

  • an epilogue. 

  • an appendix. 

  • a postscript. 

closing form

noun

  • A standard formula to end a speech. 

  • A form used to document an important legal transaction. 

  • A standard formula to end a letter. 

  • A form in an authority filled to formally document the closing a case. 

  • A method to end an implemented functionality. 

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