Fig. 5: Screenshots of the diachronic n-gram function.
From: Evol project: a comprehensive online platform for quantitative analysis of ancient literature

By inputting the user query and selecting the literature scope, the platform will return the frequency changes of n-grams on two timelines. The figure presents the outcomes sorted by the recording timeline. a Diachronic frequency changes of variants and self-references of an emperor. Diachronic frequency changes of phrase ‘礼乐 (ritual and music)’ in historical books (b) and philosophical books (c) from the legendary period to the Han Dynasty.