how do you convert Joules to Hertz

How do you convert Joules to Hertz ?

$$\small{\text{ Energy, E:\quad $ \boxed{E = h\nu} \quad $ Planck constant $ h = 4.135667516\cdot 10^{-15}\ eV\cdot s, \quad $ frequency $ \nu $ in Hz $(s^{-1})$ }}\\ \boxed{1\ \mathrm{eV} = 1{,}602 \, 176 \, 565 \cdot 10^{-19}~\mathrm {J} }$$

$$\small{\text{ Herz to Joules: }}\\ \small{\text{ We have 50000 Hz: }}\\ \small{\text{ $ 50000 Hz\ *\ 4.13566733 \cdot 10^{-15}\ eV s\ *\ 1.6021765 \cdot 10^{-19} \frac{J}{eV}= 3.3130345 \cdot 10^{-29} J $ }}$$

$$\small{\text{ Joules to Herz: }}\\ \small{\text{ We have $3.3130345 \cdot 10^{-29} J $: }}\\\\ \small{\text{ $ \dfrac{3.3130345 \cdot 10^{-29} J}{ 4.13566733 \cdot 10^{-15}\ eV s\ *\ 1.6021765 \cdot 10^{-19} \frac{J}{eV} }= 50000 Hz$ }}$$