Holly- Four Years

  'There's a human in here, sir. The Concusser didn't reach him.

  He's coming, sir. Right now, sir!'

  'Shields!' barked Root. 'Everyone!'

  Holly tried. She really did. But it wouldn't come. Her magic was gone.
...
  'You lied to me, Captain. You're not running hot at all, are you?'

  Holly shook her head mutely.

  'How long since you completed the Ritual?'

  Holly chewed her lip.

  'I'd say… about… four years, sir.'

  Root nearly popped a vein.

  'Four…Four years? It's a wonder you lasted this long! Do it now.Tonight! You're not coming below ground again without your powers. You're a danger to yourself and your fellow officers!'

-Artemis Fowl, Chapter 3