national audience to study the evolution of the content of topics over time, a tool, Diachronic’s Explorer, originally created to monitor cluster development, is presented, adapted and tested to serve on the lexical worlds resulting from the Reinert method. The aim is to improve visualisation compared to what is currently easily achievable by using lexical worlds, but also to test an alternative calculation method on this topic. An experiment has been carried out and the results confirm the relevance of this methodological transfer.