posted by ronald .
how many beats in 206 Hz
Try some of the following links to see if anything helps:
"Beats" require a mixing of two or more frequencies.
You do not get beats "in" a single frequency. You get a regular back and forth oscillation of something.
If 206 Hz is THE beat frequency of two added waves, then then the added intensity of the two waves reaches a maximum 206 times a second.