Depletion time as a function of stellar mass for model galaxies. In addition to contours, solid circles display the median depletion time within bins of stellar mass, along with the 25%–75% percentiles for model galaxies with $\mathrm{MH}2>0$. The colour contours delineate grids containing a specific number of galaxies as indicated in the colour bar, utilizing 0.2 dex-wide bins along both the x and y axes.