Frequency effects in language acquisition, language use, and diachronic change

Recent work in psychology and linguistics has shown that frequency of occurrence is an important determinant of language acquisition, language use, and diachronic change. This paper surveys the effects of frequency on the use and development of language and considers the psychological mechanisms that underlie the various frequency effects. The paper shows that frequency has an impact on the emergence of linguistic structure and that some well-known cross-linguistic tendencies arise from frequency effects.