Lipogrammatic text

[MarcoP]

This (0 frequency on a page) happens so often on bigrams that I had this idea that pages could be "lipogrammatically linked" to the next page by the absence of some common bigram.
For example:
You are not allowed to view links. Register or Login to view. : 0 al
You are not allowed to view links. Register or Login to view. : 0 al
You are not allowed to view links. Register or Login to view. : 0 dy
You are not allowed to view links. Register or Login to view. : 0 dy

Hi Nablator,
my statistical competence is limited, so it could be that I am misunderstanding something.

I have computed an histogram of 'al' counts per page on HerbalA pages (each bar counts the pages with that many occurrences). In my opinion, if we were facing the deliberate omission of 'al' on some pages, we would see two groups of pages: some with no occurrences and others with several occurrences. But here the most common situation is 1 occurrence and there is a considerable and apparently uniform spread. The number of pages with 2 occurrences is close to the number of pages with 0 occurrences. It seems to me that the simplest explanation is that the number of occurrences varies smoothly, with no break between "no-al" and "with-al" pages.

Possibly, looking at percentages instead of actual counts could tell us something more, but I don't have the time to do that right now.