I have a raster layer with few discrete values. I am just interested in raster cells, wich have a value, that have a certain frequency. So I want to give raster cells, wich values have not the certain frequency (e.g. 10 times the same value), the information "NoData" or "0" . Is there a rastercalculator tool for my goal? Or if there isn't, is there a way to do this in a external python script?