How to find which frequency occurs the most

I have an audio file. I would like to determine which frequency occurs the most in the audio file. How can I do that with Audacity?

I’m going with no. There are no convenient tools to do that. It would have to be written.

I note that any interference, buzz or hum from any source will automatically become the dominant frequency, no matter how low a volume. So pick a quiet segment of the file and Analyze > Plot Spectrum.