(ת') תקופתי; מחזורי; עונתי; פריודי

adj. occurring at regular intervals, recurrent; cyclic; seasonal, periodical

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Adjective
1. happening or recurring at regular intervals
(synonym) periodical
(antonym) aperiodic, nonperiodic
(similar) cyclic
2. recurring at regular intervals
(similar) rhythmical, rhythmic
3. recurring or reappearing from time to time; "periodic feelings of anxiety"
(similar) sporadic

příd.jm. pravidelný

Przym. okresowy; periodyczny