closing form vs sendoff

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. 

sendoff

noun
  • A party for a person (i.e. a fellow employee) who is leaving; a farewell party. 

  • A party to recognize the passing (death) of a friend and allow survivors to reminisce about the person's life. 

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