$\frac{\mathrm{\Delta }log{R}_{\mathrm{e},\mathrm{c}}}{\mathrm{\Delta }log{\lambda }^{\mathrm{RF}}}$ as a function of stellar mass and D_n4000 for two quiescent subpopulations. Circles show the median rate of change in size with rest-frame wavelength for the subpopulations of aging galaxies (shades of purple and red) and newcomers (blue) in Δ[log(M_★/M_⊙)] = 0.25 bins of stellar mass. The color of the symbols corresponds to the median D_n4000 index of the subpopulation. The panels show the four Δz = 0.1 intermediate redshift bins (as indicated in the panel legends). Error bars denote the interquartile range of the correspondingly colored population. Colors indicate D_n4000. The black curve in each panel shows the median rate of change in size with rest-frame wavelength of the total quiescent population (same as Fig. 3) and the gray area shows the corresponding interquartile range.