In this article, I address the evolution of the competition between two Latin patterns, habeo and mihi est, in Romanian. As opposed to the other Romance languages, which replace the mihi est pattern with habeo in possessor and experiencer contexts, Romanian maintains both Latin patterns. The general evolution of these patterns in the Romance languages is well known, however, a detailed usage-based account is currently lacking. Building on the theoretical findings on the role of functional competition in linguistic change, the rivalry between the two patterns in Romanian has already been argued to have settled in terms of differentiation, with each of the two forms specializing in different functional domains by Vangaever and Ilioaia in 2021 in their study “Specialisation through competition: habeo vs. mihi est from Latin to Romanian“. With this idea as a starting point, I investigate, by means of a diachronic corpus study, whether the dynamics in the inventory of state nouns occurring in these constructions can affect their evolution and productivity. The preliminary results show that this is indeed the case. Concomitantly, I explore whether the historical changes that the two patterns have undergone over the centuries can be described in terms of grammaticalization, constructionalization, or in terms of constructional change.