Frequency of companions with semi-major axis a in one-decade bins. The observed frequencies were corrected for incompleteness using the results obtained in Section 6 (averaged over mass ratios q > 0.05). Upper panel is for the whole samples considered in this paper; middle panel is only for the cores of the different stellar systems; lower panel is for the tails of of the clusters. Blue solid line is for Hyades, red dash- dotted line is for the sum of Ursa Major and Coma Berenices, black solid line is the average of the tails of the clusters, violet short-dashed line is for NYMGs (Gratton et al. 2024). Some of the distributions have been slightly shifted horizontally to allow the appropriate error bars to be distinguished.