  The launch of the Hinode satellite has allowed for seeing-free observations
at high-resolution and high-cadence making it well suited to study the dynamics
of quiescent prominences. In recent years it has become clear that quiescent
prominences support small-amplitude transverse oscillations, however, sample
sizes are usually too small for general conclusions to be drawn. We remedy this
by providing a statistical study of transverse oscillations in vertical
prominence threads. Over a three-hour period of observations it was possible to
measure the properties of 3436 waves, finding periods from 50 to 6000 s with
typical velocity amplitudes ranging between 0.2 to 23 km s$^{-1}$. The large
number of observed waves allows the determination of the frequency dependence
of the wave properties and derivation of the velocity power spectrum for the
transverse waves. For frequencies less than 7 mHz, the frequency-dependence of
the velocity power is consistent with the velocity power spectra generated from
observations of the horizontal motions of magnetic elements in the photosphere,
suggesting that the prominence transverse waves are driven by photospheric
motions. However, at higher frequencies the two distributions significantly
diverge, with relatively more power found at higher frequencies in the
prominence oscillations. These results highlight that waves over a large
frequency range are ubiquitous in prominences, and that a significant amount of
the wave energy is found at higher frequency.
