Introduction -- What can we count in language, and what counts in language acquisition, cognition, and use? -- Are effects of word frequency effects of context of use? An analysis of initial fricative reduction in Spanish -- What statistics do learners track? Rules, constraints and schemas in (artificial) grammar learning -- Relative frequency effects in Russian morphology -- Frequency, conservative gender systems, and the language-learning child: Changing systems of pronominal reference in Dutch -- Frequency Effects and Transitional Probabilities in L1 and L2 Speakers' Processing of Multiword Expressions -- You talking to me? Corpus and experimental data on the zero auxiliary interrogative in British English -- The predictive value of word-level perplexity in human sentence processing: A case study on fixed adjective-preposition constructions in Dutch -- Index.