D defs.my
Entry 1 sense Webster, 1913

Periodically

· Pe·ri·od·ic·al·ly · IPA /pˌiːriːˈɑdɪkəliː/
01 adv. In a periodical{4} manner; as, flooding occurs periodically in the valley.
  1. 1.
    In a periodical{4} manner; as, flooding occurs periodically in the valley.