Distribution of the average flux density found in the TELAMON sample sources for the 20 mm (top), 14 mm (center), and 7 mm (bottom) receivers. The histogram is divided into the source classes EHBL (blue with diagonal stripes), HBL (blue), IBL (yellow with dots), LBL (magenta with circles), and FSRQ (black with vertical stripes). The red vertical lines indicate the flux density above which one can expect a > 50% detection chance per epoch (see Sect. 4.3). Below these thresholds the statistics are significantly affected due to the limited telescope sensitivity. For 20 mm we do not have enough data on the faintest sources to determine this limit.