Galaxy and BH coevolution history traced by M_* and BH masses. Panels from top to bottom show the M_• − M_*, M_Torque − M_* and M_Bondi − M_* relations as data points colour-coded by their residuals at z = 0 (Δ_z = 0). Columns from left to right show galaxies with stellar mass at z = 0 in the ranges 10.0 < log(M_*/M_⊙) < 10.5, 10.5 < log(M_*/M_⊙) < 11, and 11.0 < log(M_*/M_⊙) < 13. The galaxy number (n) in each stellar mass bin at z = 0 is given in the top-left corner. For reference, we show the scaling relation at z = 0 from Figure 2 as a black solid line. Median growth histories for galaxies with Δ > 0 and Δ < 0 are shown as red and blue solid lines, respectively, with the start redshifts of growth labelled. The separation time Z_{Δ,  sep} of M_• − M_* growth histories for the Δ > 0 and Δ < 0 populations, defined as the epoch when variance between their median growth trajectories first exceeds 0.1 dex, is indicated by large black dots. The separation time Z_{Torque, sep} between the median M_• − M_* and M_Torque − M_* is marked with filled stars: red for Δ > 0 and blue for Δ < 0. To highlight these differences, the redshifts of Z_{Δ,  sep} and Z_{Torque, sep}are labelled in the first row, in red for Δ > 0 and blue for Δ < 0.