ENThis work focuses on the Slavic and Baltic adverbials of time distributivity that employ the schema “(X) what X” with the meaning ‘every X’. The constructions under investigation relate to English sentences (1) I pay the bills every month and (2) Every five days I pay the bills. In the languages where such constructions are attested there are two different ways to express ‘every X’ meaning: first, with the common Slavic determiner každy(j) ‘every’ or Lithuanian kiekvienas ‘every’, second with the constructions with interrogative/relative pronoun Slavic co/čo/š’o/što ‘what’ and Lithuanian or Latgalian kas ‘what’. The determiner combines with noun phrases that can appear in three cases: nominative, accusative and genitive.