Zipf Distribution

Zipf Distribution of Website Popularity: "Much available data suggests that Web use follows a Zipf distribution." It appears to apply within a site and across sites. It also applies to outgoing page requests from a network and it applies to links.

"Zipf's law, an empirical law formulated using statistics, refers to the fact that many types of data studied in the physical and social sciences can be approximated with a Zipfian distribution, one of a family of related discrete power law probability distributions."