Average cumulative mass fraction as a function of time. The ATLAS^3D sample is separated into 0.5 dex mass bins from 10–10.5 log M_JAM in cyan to 11.5–12 log M_JAM in red (adapted from Fig. 15 of McDermid et al. 2015). NGC 1277 is shown in orange, and NGC 4262, the fastest growing galaxy in the ATLAS^3D sample, is indicated as a dashed red line. ZF-UDS-7329 is shown in black. Here, we use the result obtained with the Milky Way-like IMF for consistency with the ATLAS^3D sample. The first episode of star formation for every galaxy is set at time zero.