Historical studies have been called 'idiographic' as describing dates and place particulars, as do many phases in geology or astronomy, in contrast to 'nomothetic' studies such as physics and chemistry, which are supposed to lay down rules to hold regardless of date.
-- Marshall G. S. Hodgson, The Venture of Islam
The data are usually presented statistically, demographically, or epidemiologically. The nineteenth-century Germany philosopher Wilhelm Windelband called this view the nomothetic approach to knowledge.
-- Edwin S. Shneidman, Autopsy of a Suicidal Mind
Nomothetic stems from Greek roots nomo- meaning "law, custom" and thet meaning "place, set."