“…The studies of first language acquisition (Yavaş & Marecka, 2013;Marecka & Dziubalska-Kołaczyk, 2014;Zydorowicz, 2010;Dziubalska-Kołaczyk, 2019) showed again an impact of frequency. For example, a Polish child (female, Poznań, age 1;7-3;2, a longitudinal study) produced / pʂ-/ most frequently, which is also the most frequent cluster in Polish, and the second most frequent cluster in her production was /st/, which is the third most frequent one in Polish.…”