In reply to Steve Dempsey.

You could do that. Novak was concerned with the empirical frequencies that appear in common English usage, which is quite different from the dictionary frequencies. I should stress that the summary statistics that I use in this article are rounded to 5 decimal places. Rather than saying that KK doesn't appear in the corpus, I should have said, "the proportion of the KK bigram is extremely small." I did better in the previous article when I said, "the grey cells are bigrams that were not found in the corpus or were extremely rare."