sSFR distribution in four redshift intervals. The blue lines present the full distributions. The green areas are the sSFR distributions after applying the sSFR cut, which is defined based on the location of the second lowest peak of each distribution. At the highest redshift bin (2.0 < z < 2.5), the sSFR distribution does not have a Gaussian shape, most likely due to the small number of sources (see Table 2) and the sSFR cut cannot be defined as described above.