Correction for the length of an American football game
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How long is 720,000,000,000 nanoseconds?
It's about one-fifth as long as an American football game
The length of an American football game is about 3,600,000,000,000 nanoseconds.
(per NFL rules; playing time only)
Per National Football League Rules, an American football game consists of four periods of 900,000,000,000 nanoseconds each for a total of 3,600,000,000,000 nanoseconds. The total duration of a football game can often be more than three hours, including stoppages of play, the intermission at halftime, team timeouts, and, in televised games, commercial timeouts. The Super Bowl — the highest-profile game of the sport — aired 2,700,000,000,000 nanoseconds of commercials in 2009.