Time track

A time track was an ability to travel through time.

History
The Doctor and Rose chased a Chula ambulance through the time vortex. It began jumping time tracks and the Doctor lost it for a while. He managed to find where it landed and believed it to only have landed, at maximum, a month before he and Rose arrived. (DW: The Empty Child)

The Doctor would later believe that the TARDIS slipped time track when he, Amy and Rory were having several dreams, before discovering it was the work of psychic pollen which had fallen into the TARDIS' time rotor. (DW: Amy's Choice)