Illustrative distribution of the periods of GD 358 according to TESS (19 periods, black lines, upper panel), and according to Bischoff-Kim et al. (2019) (15 mean periods, red lines, middle panel, and 352 periods, blue lines, lower panel). The period at 1014.35 s in the middle panel, represented with a red-dashed line, corresponds to a single detection in the 2016 ground-based observations. The amplitudes have been arbitrarily set to one for clarity.