self-delete vs strike down

self-delete

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

  • To self-destruct. 

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

strike down

verb
  • To kill someone or something; to cause to die suddenly. 

  • To prostrate by illness. 

  • To knock down. 

  • To invalidate (a law, statute etc.) 

How often have the words self-delete and strike down occurred in a corpus of books? (source: Google Ngram Viewer )