Upper panels: histograms of the # of 1D KDE peaks found per CR for the measured sunspot data and samples from randomly generated solar cycles for two cases. Solar cycles have an increasing and a decreasing phase of activity, and sunspots can live up to multiple CRs. The randomised data are of 13 cycles randomly chosen from our samples for each case. Bottom panels: Histograms of the Cucconi test p values for 10 000 groups of 13 randomly sampled solar cycles from the random numbers generator, corresponding to the cases of the upper panels.