The occurrence of not-contraction (e.g. she isn’t) in three genres in CONCE is examined in detail. In an overall quantitative analysis, not-contraction is compared with uncontracted forms as well as operator contraction (e.g. she’s not). Other potential factors accounted for include the operator itself, gender, word order (e.g. is she not vs. is not she), and no-negation as an alternative negating strategy. A multifactorial, variationist analysis of contexts where not-contracted and uncontracted forms are the main variants demonstrates the importance of factors such as genre and tense. The results provide solid evidence of colloquialization in Drama and Fiction, where not-contraction becomes more frequent; they also reveal that women may have used contraction less than men, which is expected considering the stigmatization of not-contraction, and that the uncontracted is not she pattern in questions may have been used as a more acceptable way of rendering spoken contractions in writing.