Obtain the frequency of revolution of the electron in its circular orbit. Does the answer depends on the speed of the electron ? Explain

Question

$\begin{array}{1 1} 18.18 \times 10^6\; Hz \\ 18.18 \times 10^7 Hz \\ 1.818 \times 10^6 Hz \\ 1.818 \times 10^5 Hz \end{array} $