wystpowaniu

Występowanie is a Polish noun that denotes the occurrence, presence, or frequency of a phenomenon in a given context. It refers to how often and where something happens, or to the distribution of a characteristic over time or space. The term is formed from the verb występować (to occur, to appear) with the nominalizing suffix -anie, and it functions as a neuter noun.

The word is used across disciplines to describe empirical situations such as the occurrence of events, traits, or diseases. In epidemiology, for example, występowanie chorób expresses the prevalence or incidence of illness within a population. In linguistics or acoustics, it can describe the distribution of sounds or linguistic features. In ecology or geography, it may refer to the geographical or temporal pattern of species, phenomena, or processes. The concept is closely related to, yet distinct from, related terms such as frequency, prevalence, or distribution, depending on the precise definitional context.

In Polish, występowanie should not be confused with related terms such as wystąpienie, which describes a single appearance, or with występ, which can mean a performance or episode. Correct spelling is with the diacritic in the root: występowanie; inflected forms occur in different cases (for example, występowaniu, występowaniem) as required by sentence syntax. Common misspellings without the diacritic are frequent in informal writing.

Overall, występowanie serves as a concise label for describing how often and where a phenomenon occurs within a body of data or observed reality.