How literal is this phrase?

Sample examples at http://tinyurl.com/is-it-lit

night owl:

Definitions:

  1. a person who likes to be active late at night

Examples:

  1. constant battle for us , as he is a morning person & I am a night owl , so I find that going to sleep at 9.30 really cuts out the best
  2. usually spend the night watching movies or searching for visual imagery . I 'm a night owl , and seldom go to bed before midnight . What Is The MorrisWhat is the
  3. will be most focused on your studies . Are you a morning person or a night owl ? Do you concentrate best after a cup of coffee or after lunch ? Once
  4. the subject until the last week or so . My friend and I are both night owls , are intrigued and like an adventure . I first heard of Pluckley in the
  5. his wife will want to go ? The irony is that Crawford is not a night owl . Furthermore , she is not fond of Las Vegas . “ Cindy ’ s

Note: Please select the answers below carefully based on the definition which occurs frequently in the examples

Step 1: score of 0-5 for how literal is the use of "night" in the phrase "night owl"
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