Axis rescale in FFT.C

I was playing with the FFT.C and tried to extract the frequency of the input fuction.
The totorial says:

Unfortunatelly I couldn’t figure out how this is done.
Any advice?

I am having the same issue. Was this ever solved?

I found this thread Rescaling the x-axis of FFT transformed histogram but I am still having some issues.

I guess you can use Scale on hm …

The question might be more related to the problem of rescaling the X-axis (as discussed e.g. here Feature Request: Transform TAxes)