More recently, grammaticalization theorists have become increasingly aware of the role of collocations in grammatical development. One of these roles is to define phonetic reductions and fusion in frequent collocations as constructionalization. Based on frequency of occurrences, the present study explores the implications of high-frequency collocations in Turkish Sign Language for grammaticalization and offers a novel account of constructional change of değİl ‘not’ on usage-based grounds. Specifically, the study suggests that (i) the chunking process is not language-specific within the spoken (...) modality, as noted previously in the literature, (ii) the frequency of collocations is strongly correlated with phonetic reduction and duration, (iii) the fusional characteristics of [sign + değİl] collocations can be classified under four reduced constructional schemas, (iv) the monosyllabicity of a scheme appears to be criterion for it to be productive in signed modality and (v) the semantic changes of frequent [sign + değİl] collocations are related to the notion of subjectification in TİD. (shrink)