aikajakson

Aikajakson is a Finnish noun referring to a defined time interval or time period that is used as a unit of analysis, reference, or description in various disciplines. The word is a compound of aika (time) and jakso (period), and aikajakson is the genitive singular form, meaning “of the time interval” or “the time interval’s.”

Usage and scope: In history, archaeology, and demography, aikajakson denotes a discrete span of years or decades that researchers study as a unit. In data analysis and climatology, it designates a fixed window over which observations are aggregated or modeled, such as a 30-year aikajakso (time interval) window.

Relation to related terms: A closely related Finnish term is aikajakso, which refers to the time interval itself, while aikaväli also means a time span and is used more generally. The form aikajakson typically appears in phrases indicating possession or reference to that interval.

See also: time window, time series, historical period.