Histograms of the ZPVE corrected BEs obtained for CO adsorbed on five npASW (upper panel) and five pASW surfaces (lower panel). The color-coded bars below each panel indicate the BE groups (VL: Very Low, Low, Medium, High, and VH: Very High). Gaussian fits were obtained using the bootstrap procedure detailed in Appendix E, which propagates individual uncertainties from the neural-network models into the Gaussian fitting procedure.