Integrated duration of mass transfer through RLOF (ΔT_MT) in all the binary models computed across different primary masses M₁, orbital periods P_ini, and metallicities. Each binary evolution model is represented by a rectangle colored according to its corresponding log(ΔT_MT/yr) value. Missing rectangles are nonconverged models. The binary models are mapped onto the parameter space of varying M₁ and P_ini, with different background areas indicating the evolutionary state of the donor star at the moment of the initial RLOF (similar to Fig. 1): the MS donors (dashed), rapidly expanding HG donors (light gray), and core-He burning donors (densely dotted). Rectangles colored in various shades of yellow and orange correspond to models that evolve through a phase of nuclear-timescale mass transfer (log(ΔT_MT/yr)≳5).