Definition of "once in a while" [once in a while]

• Occasionally; sometimes. (adverb)

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• "Every once in a while my father would take me out on a fishing boat called theHellena with his friends."
• "Now that Noelle was truly gone, she was back to her bitchy self, and only every once in a while did Cool Cheyenne come shining through."
• "It clearly depicted a little boy and a slightly bigger woman dancing the cancan and every once in a while kissing a little."