Time required to assemble 80% of the ever-formed stellar mass of bulges and disks vs. the total present-day galaxy mass. Linear relations for both stellar components are over-plotted (solid lines for the bulge, dashed lines for the disk). The marks are colour coded according to their ⟨δμ_9G⟩ interval (iA blue, iB green, iC red) and their size represents the measurements for bulge and disk (bigger and smaller circles, respectively).