Period distribution, after applying filter-2, for the subsets with RV period similar to one or more photometric periods (top panel), or twice of it (bottom panel). The light gray and dark gray histograms represent the sets in which the RV period is similar to at least one photometric period or to all of them, respectively. The colored curves represent the sets in which the RV period is similar to P_G (green), (blue), or (red).