an hero vs self-delete

an hero

verb
  • To commit suicide. 

noun
  • A suicidee; one who commits suicide. 

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. 

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