put out of one's misery vs self-delete

put out of one's misery

verb
  • To end or destroy something for the good of the individuals involved in it. 

  • To submit a person or an animal to euthanasia. 

  • To provide somebody information which they have been expecting. 

self-delete

verb
  • To self-destruct. 

  • Code that overwrites itself upon completion, usually with 0x00 or 0xFF bytes that represent an unwritten region. 

  • To commit suicide; to take one's own life. 

How often have the words put out of one's misery and self-delete occurred in a corpus of books? (source: Google Ngram Viewer )