Histograms of the WD (left) and the same histograms, but weighted by the size (area) of the MBFs (right). The bin size is variable from 4.8 km for K8V to 24.3 km for F5V to keep a constant bin number of 15 for each spectral type. Colors indicate various spectral types according to the inserted legend on the left panel. The histograms are based on the geometric maps of the τ = 1 surface of the full time series.