Two-dimensional distributions of the migration time t_migr as a function of the initial radius R_init in SG AGN disks, for different combinations of the viscosity parameter α (left: 0.01; right: 0.1) and torque prescriptions (top: G24; bottom: B16). Each panel shows contours enclosing 40% and 68% of the migration time distribution, based on our simulations. Results are shown for four representative SMBH masses: log(M_•/M_⊙) = 5.0, 6.3, 7.7, 9.0, indicated by color. Solid (dashed) lines represent the migration timescale computed using the torque Γ in Eq. (1) (Γ₀ in Eq. 12). Vertical dotted lines mark the locations of migration traps.