How literal is this phrase?

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

graveyard shift:

Definitions:

  1. the work shift during the night (as midnight to 8 a.m.)
  2. workers who work during the night (as midnight to 8 a.m.)

Examples:

  1. in the Meyrick Suite , BIC at 12.45 pm . Hmm , that 's the graveyard shift of conference week is n't it ? Not at all-it 's the fringe meeting so
  2. , dads working two jobs , dead end jobs , labor workers , helpers , graveyard shift workers , long commuters , students and on and on and on . Actually ,
  3. 0 pm slot to his lower profile life as a DJ on Radio Norwich 's graveyard shift . Here is a selection of images of his flirtation with the 800 ... and
  4. , as experienced and weaved together by a lone and quirky bellhop on his first graveyard shift . Utilizing visual satire to depict five revolving scenaros , director Robby D engages all
  5. presentation at our Annual Conference - it was n't easy as they were given the graveyard shift - yet no-one made their escape or even nodded off ! " General Aviation and

Step 1: Select the definition of graveyard shift which occurs most of the times in the above examples. Ignore other definitions.

Definition1 Definition2

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

Step 3: score of 0-5 for how literal is the use of "shift" in the phrase "graveyard shift"
0 1 2 3 4 5

Please provide any comments in case you want to tell us about your judgement or any other queries/suggestions! Not Mandatory but helpful.