This is short term prisoners being released eighteen days earlier than they otherwise would have done.

BBC: Jack Straw MP. photo courtesy Jeff Overs

The recipient lived just eighteen days, but the feat was a milestone in the history of medicine.

NEWYORKER: The Operator

Eighteen days later it had dropped to No. 10 in the rankings.

FORBES: Another Angry Birds Manager Flies The Nest

Eighteen days, in the case of my test model.

FORBES: R.I.P., My Chrome Laptop

Eighteen days later Mr Flowers had acquired a controlling interest in Enstar, a small firm in Alabama that had two big attractions: a stockmarket value beneath its cash holdings, and a tax-loss to carry forward.

ECONOMIST: Face value

It took her seventy-one days, fourteen-hours, eighteen-minutes and thirty-three seconds.

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