N-gram
en.wikipedia.org/wiki/N-gram
Article
N-gram
Item sequences in computational linguistics
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Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
In the fields of computational linguistics and probability, an n-gram is a contiguous sequence of n items from a given sequence of text or speech. The items in question can be phonemes, syllables, letters, words or base pairs according to the application. n-grams are collected from a text or speech corpus.