Comment:

When c is low, it is naturally expected that the models will be predominantly $100\%$ in the red. As c increases, red frequency drops and the green frequency increases. The yellow frequency - not plotted - peaks somewhere between $50\%$and $100\%$ - and is different for different models. The X-axis of the plots are restricted to high c to highlight the portions which are most interesting for comparing the models.

This absolute measure does not carry much more information than the exceedence ratio presented in the last section. It also inherits the digital property of the exceedence ratio - in that it is not sensitive to the degree of exceedence. The main motivation of this measure is only to present exceedence information in the more popular framework of the BIS colour designations.