Temporal frequency
A temporal frequency is a specific energy modulation of temporal energy, a force closely related to instances of time travel.

In 2371, Miles O'Brien and Julian Bashir managed to control a series of time shifts O'Brien had been experiencing as a result of the interaction of temporal energy being emitted by the artificial quantum singularity of a cloaked Romulan Warbird with the delta-series radioisotopes which O'Brien had absorbed as a result of the explosion of a plasma conduit, by calibrating the isotopes' decay rates to match the temporal frequency of the singularity. This allowed O'Brien to travel three hours into the future and uncover a Romulan plot to destroy Deep Space 9. ()

Time travel