Mass-weighted stacks of normalized SFHs of galaxies in three bins each of M_⋆ and Δ_MS in the redshift range 0 < z < 2. The number in the legend of each panel indicates the number of galaxies that contribute to the stack. In each bin, the SSP weights of each contributing galaxy are first normalized and then averaged over all galaxies that contribute to the bin. The underlying inferred SSP weight-grid is collapsed into four age bins, where each bin has a width of 1 dex, as indicated. For each individual galaxy SFH, the age-cutoff of the SSP templates depends on the redshift of the target and is 0.1 dex at least and 0.2 dex at most, i.e., either one or two age bins, older than the age of the Universe at that redshift (see McDermid et al. 2015, for a discussion). The 1 dex age-bin weights are then calculated from the sum over all galaxies and over all their weights falling into that age bin (see Section 2.1 for more details).