Frequency of oscillation is proportional to

A block of mass $0.2 \mathrm{kg}$, which slides without friction on a $30°$ incline, is connected to the top of the incline by a massless spring of force constant $80 \mathrm{N} {\mathrm{m}}^{-1}$ as shown in the figure. If the block is pulled slightly from its mean position, what is the period of oscillations?

The displacement $x$ (in metre) of a particle in, simple harmonic motion is related to time $t$ (in seconds) as $x=0.01\cos \left(\mathrm{\pi }t+\frac{\mathrm{\pi }}{4}\right)$

The frequency of the motion will be