English Reference
adverb

periodically

adv.
US /ˌpiɹiˈɑdɪkəɫi/ UK /pˌiəɹɪˈɒdɪkli/ pe·ri·od·i·cal·ly

  1. 01 B2 Upper Intermediate Academic

    happening repeatedly at set times or after a certain amount of time has passed.

    occurring at regular or fixed intervals. This sense often implies a planned or systematic repetition.

    Simple

    The security guard checks the back door periodically throughout the night.

    In context

    The software is programmed to back up all active files periodically, ensuring that no more than fifteen minutes of work is ever at risk.

    Usage

    Typically placed after the verb or at the end of a clause to modify the frequency of an action.

  2. 02 B2 Upper Intermediate

    happening every now and then, but not necessarily on a strict schedule.

    occurring intermittently or from time to time. While similar to 'regularly', this sense can describe less predictable recurrence.

    Simple

    We periodically meet for coffee to catch up on each other's lives.

    In context

    Although they lived in different countries, the sisters periodically exchanged long letters to maintain their close relationship.

    Usage

    Often used at the beginning of a sentence for emphasis or after the main verb.

Wesson says that if you really need to check emails on holiday, then it's better to say, "I will be periodically checking emails," as it manages expectations.

BBC News· 17 Aug 2026

It grants the wearer mighty powers but periodically needs recharging from a big green power pack.

The Guardian· 17 Aug 2026

From periodic + -ally.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated