When he complained of severe pain, his mom, Kansonia Love, took him to the emergency room at three different hospitals in four days but was told not to worry: It was just a sprain.

FORBES: Germ Warfare

That is four games, in four different time zones, in nine days.

BBC: SPORT | Football | Beckham's football and flying diary

Two years earlier, Mr. Bodsworth put a different condo up for sale and had three offers in four days.

WSJ: Toronto Condos Cool

Even on one of the nation's busiest routes, Los Angeles-New York, which has lots of low fares, seats at the basic mileage level were available only about half of the days through the rest of this year in a check of four major airlines in six different markets.

WSJ: Finding the Elusive Formula for Cashing in Miles

Every year during the four days before Lent, the Carnival de Barranquilla offers a repertory of dances and musical expressions originating from different Colombian sub-cultures.

UNESCO: Intangible Cultural Heritage