PAT_LI2020 period-spacing pattern from Li et al. (2020a). The Lomb-Scargle periodogram is shown in grey, the extracted frequencies in light blue, and the residual periodogram with the extracted frequencies removed in orange. Orbital harmonics are excluded. The S/N is indicated by the colour of the ‘X’ symbol for each extracted frequency, while the amplitude and period errors (more easily seen in the inset panel, which better shows the low-amplitude behaviour) are shown in orange. The extracted frequencies selected to be part of the pattern are marked with a filled black circle. Note that only the black point and the AMiGO fit and predictions are specifically related to the PAT_LI2020 pattern; the Lomb-Scargle periodogram and its residuals, as well as the extracted frequencies (and their associated S/N and errors), are included from the period04 extraction for comparison purposes.