Total fractional accretion rates for each of the 18 spectroscopic subsamples h ₇₀ Gyr ⁻¹ integrating over all the galaxies from the imaging sample. The thick lines are for the red spectroscopic subsamples and the thin lines are for the blue spectroscopic subsamples. The solid lines are for the merger rate under assumption of t _{merge, i} = t _{KW, i} , and the dashed lines are for the merger rate under assumption of t _{merge, i} = t _{BT, i} .