Electromagnetic Induction and Alternating Currents: JEE Main 2021 Physics question

If the maximum value of accelerating potential provided by a ratio frequency oscillator is 12 kV. The number of revolution made by a proton in a cyclotron to achieve one sixth of the speed of light is ............... [m_p = 1.67 $\times$ 10^$-$27 kg, e = 1.6 $\times$ 10^$-$19C, Speed of light = 3 $\times$ 10⁸ m/s]