The paper attempts to identify the usage and productivity of five different international suffixes in Slovak by means of corpus evidence. The analysis focuses on real and potential productivity in a two-stage comparison: 1) tokens/lemmas occurring in a general balanced corpus vs general corpus of specialised and academic texts, 2) general corpus of specialised and academic texts vs specialised (sub)corpora of medical, legal, economic and religious texts. The aim of the analysis is to explore whether productivity varies across registers by means of statistical measures.