Zipf’s law

Law of sta­tis­ti­cal reg­u­lar­i­ty named after George Kings­ley Zipf (1902–1950).

[wikipedia] [google]

Short def­i­n­i­tion and info page from NIST

Good, clear arti­cle explain­ing Zipf’s law by Dr. Richard S. Wal­lace

Aca­d­e­m­ic site con­tain­ing a lot of infor­ma­tion on Zipf’s law, includ­ing ref­er­ences by year