Polarplot 360° without legend numbers

[#1]

We are plotting a polarplot with frequencies. Where there is one variable for which the frequency of its 360° values is plotted. Unfortunately, all 360 values are plotted around as a legen. But instead of every 1°, we prefer every 30°. How can we do this, any ideas?

If we chose uncheck "Show Legend", we obtain a figure with no legends at all.

Any help will be apprecciated.

Cheers,

Jonas