периодический bedeutet auf Englisch

periodic▼(having repeated cycles)
adjective
[UK: ˌpɪə.rɪ.ˈɒ.dɪk] [US: ˌpɪ.ri.ˈɑː.dɪk]

recurrent▼(recurring time after time)
adjective
[UK: rɪˈk.ʌ.rənt] [US: rɪˈk.ɜː.rənt]

recurring▼(happening frequently)
adjective
[UK: rɪˈk.ɜːr.ɪŋ] [US: rɪˈk.ɜːr.ɪŋ]