dormition vs twenty winks

dormition

noun
  • The process of falling asleep. 

  • The death and assumption into heaven of the Virgin Mary. 

  • The process of death or the actual death itself. 

twenty winks

noun
  • A very short sleep, half as long as forty winks. 

How often have the words dormition and twenty winks occurred in a corpus of books? (source: Google Ngram Viewer )