Demographics of next subsequent triplet after the FRB-event trigger time. We refer to the text for the description of the plotted quantities. Each point corresponds to one FRB trigger. We mark the non-repeating FRB sources with black crosses, while the repeaters are marked in different colours according to the legend in the top panel. The red solid, dashed, dot-dashed, and dotted lines mark the confidence levels corresponding to 2, 3, 4 and 5σ, respectively.