'been shortened from' is correct and usable in written English.
It is typically used to describe an edited version of something that was at one point longer. For example: "The party was shortened from three hours to two."
It has already been shortened from 18 months in the 1960s to nine and now a vestigial six, half of which will be spent training.
Parents feared that Gymnasien, where the course of study had already been shortened from nine years to eight, would be crippled by the loss of two more.
In the past, the governing bodies of the bruising game have tweaked rules to protect combatants; for example, championship bouts have been shortened from 15 to 12 rounds.
Doubles has also been shortened from an eight-game pro-set to one six-game set, and the gap between the doubles matches and singles will be only five minutes.
They found that if there had been no unemployment insurance at all in January 2009 (instead of the 99 weeks provided by federal extensions), the average duration of unemployment would have been shortened from 4.89 months to 4.55 months.
Other sports have been affected, too: the Mets cancelled two games this weekend, the Giants and Jets have moved tomorrow's preseason game to the hopefully dry afternoon, and the Barclays Classic, a golf tournament in New Jersey, has been shortened from seventy-two to fifty-four holes.
(The program was shortened from 90 minutes in the 1980s).
The term is shortened from the words "binary digit".
And the process -- from idea to installation -- could be shortened from weeks to overnight, he said.
Was her suspension, which was shortened from two years on appeal, long enough?
The name was shortened from Van Auten at some time after they arrived and settled in Flatbush, Brooklyn.
