Temporal pocket

A temporal pocket, also known as a time pocket, (AUDIO: The Eternity Cage) was an area or section of space.

History
During the Last Great Time War, the Eighth Battle Fleet of the Sontaran Empire used time pockets to age a force of Dalek drones and their ship "to destruction". The Dalek Time Strategist proclaimed that this tactic was "Time Lord trickery", but General Fesk insisted it was a Sontaran tactic. (AUDIO: The Eternity Cage)

The Sontarans set the ATMOS devices in a time pocket one second off real time. (TV: The Sontaran Stratagem) The New Dalek Empire used a temporal pocket to hide the Medusa Cascade from the Tenth Doctor. (TV: The Stolen Earth)