<p><strong>Adverb</strong></p><ul><li>At irregular intervals of time; intermittently: Internships of various types are available periodically.</li><li>You will need to recharge the battery periodically; the recharge interval will vary depending upon use.</li><li>At regular or somewhat regular intervals of time: By periodically—perhaps monthly—performing this test, you can quantitatively assess the impact of your training.</li></ul>