Distribution of observer-frame quiescent gap durations, t_gap ≡ t₁(G₂) − t₂(G₁), for the two pulse-resolved samples analyzed in our series. The filled histogram shows the 24 PE+ME GRBs from Paper I, while the step histogram shows the 24 ME+EE GRBs from Paper II (this work). The vertical dashed line marks t_gap = 15 s, illustrating that a good fraction of the events in both samples cluster at short gaps (t_gap ≲ 15 s), with a smaller fraction extending to longer quiescent intervals. Histogram counts are shown without normalization.