Plots of Rayman Malek's character counts

Rayman Malek posted to the Voynich list a table with the total number of characters (N) and the number of distinct characters (K) on each page of the herbal section, according to his own 39-letter alphabet. At Rene's suggestion, I made a plot of K versus N, with the hope of spotting "anomalous" pages.

Each dot represents a page, in the range f1r-f55v; the horizontal axis is the total number of characters in the page, the vertical axis is the number of *distinct* characters that occur in it.