The equation Tdeg = x(1/f)/360 is equivalent to ΔΦ(1/f)/360:

Tdeg = x(1/f)/360 is equivalent to ΔΦ(1/f)/360, indicating that the time period Tdeg in degrees is proportional to both the phase shift ΔΦ and the reciprocal of frequency 1/f, with both quantities scaled by 1/360 to convert to the unit of phase.  

Tdeg = x(1/f)/360 = ΔΦ(1/f)/360, so that x = ΔΦ (Phase shift)