Scholars in different fields studied the issue of formulaic sequences, namely in general linguistics, corpus linguistics, phraseology, lexicography, psycholinguistics, neurolinguistics, first and second language acquisition and others.
This article discusses the problem of defining formulaic sequences in language use as it is presented in the 2004 volume “Formulaic Sequences”, edited by Norbert Schmitt.
Different factors that might affect the extent of exposure to a language include classroom focus, the time spent in a country where the language is spoken as native, and the amount of reading in the language.