The diction Install diction package contains a tool called style, which analyses the surface characteristics of the writing style of a document. It prints various readability grades, length of words, sentences and paragraphs. It can further locate sentences with certain characteristics.
L. Torvalds. Proceedings of the AUUG94 Conference: Open systems. Looking into
the future: 6--9 September 1994, World Congress Centre, Melbourne,
Australia, Seite 9--14. Kensington, NSW, Australia, AUUG Inc, (1994)