@inbook{c8dd5cf080f4436ebfc667e192599d3d,
title = "Establishing a {\textquoteleft}new normal{\textquoteright}: detecting fluctuating trends in word frequency over time",
abstract = "In this chapter we introduce statistical methods and associated visualisations for the analysis of lexical change on a monthly basis in a 1.8-billion word news corpus spanning over 30 years. In previous work (Kehoe et al. 2022) we found examples of word frequency change in a data-driven manner by applying existing statistical tests. An ongoing limitation is that, as our diachronic corpus grows, so too does the possibility of a word exhibiting multiple frequency changes in different directions. This chapter reframes the problem as one of time-series segmentation, dividing the frequency history of a word into timespans exhibiting consistent upward or downward change. We then determine reasons for such changes by applying horizon graph visualisations to collocates.",
keywords = "lexical change, collocation, time series, visualisation, diachronic change",
author = "Matt Gee and Andrew Kehoe and Antoinette Renouf",
year = "2024",
month = oct,
day = "17",
doi = "10.1075/scl.119.06gee",
language = "English",
isbn = "9789027215949",
series = "Studies in Corpus Linguistics",
publisher = "John Benjamins Publishing Company",
pages = "125--152",
editor = "Sarah Buschfeld and {Patricia Ronan} and Theresa Neumaier and Andreas Weilinghoff and Lisa Westermayer",
booktitle = "Crossing Boundaries through Corpora. Innovative corpus approaches within and beyond linguistics",
}