eternal sleep vs last roundup

eternal sleep

noun
  • Death 

  • A magical state of suspended animation, a state of ageless, deathless, everlasting sleep. Well-known examples are Endymion, (the lover of the Greek moon goddess, Selene), and the princess from Sleeping Beauty. 

last roundup

noun
  • Death. 

  • A final gathering of people or items; the final event in a series of events involving a group or organization. 

How often have the words eternal sleep and last roundup occurred in a corpus of books? (source: Google Ngram Viewer )