EN
This article looks at morphological productivity and lexicalization. Productivity, first, bears a significant relationship with frequency because both seem to be subtly interlinked through low-frequency items. Much the same happens between lexicalization and frequency, although their association must be seen from a different angle because lexicalized words tend to have greater frequencies than non-lexicalized words. The novelty of this paper is that it provides a link between the above two notions and corpus-based frequency figures, and then operates a formula (π) on two sets of units, some lexicalized, some synchronically analysable. The two subcorpora confirm a correct function of π to tell between words which tend to be used by means of word-formation vs. words which already exist in the individual's lexicon.