Lookups spiked on April 6, 2011.
Furlough meaning "a period of time when an employee is told not to come to work and is not paid" has been used frequently as Democrats and Republicans square off in a budget debate that may shut down the federal government.
"The CIA, FBI and other U.S. intelligence agencies are planning potentially significant employee furloughs in the event of a federal government shutdown, top agency officials said on Wednesday." Reuters, April 6, 2011
Furlough comes from the Dutch word that means "permission."