Synonyms of epochal

2 Syllables
weekly, fitful, broken, checked, monthly, hourly, rhythmic, cyclic, shifting, serial
3 Syllables
iterant, punctuated, stop-and-go, metrical, rhythmical, orbital, infrequent, cyclical, recurring, spasmodic, periodic, recurrent, centennial, momentous, arrested, seasonal, iconic, hit-or-miss
4 Syllables
occasional, discontinuing, alternate, discontinuous, intermittent, isochronous, periodical, isochronal, interrupted
5 Syllables
iterative
6 Syllables
on-again-off-again