slumber vs twenty winks

slumber

noun
  • A very light state of sleep, almost awake. 

  • A state of ignorance or inaction. 

  • The snooze button on an alarm clock. 

verb
  • To be inactive or negligent. 

  • To be in a very light state of sleep, almost awake. 

twenty winks

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

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