once in a while

once in a while idiom
Occasionally, not very often, as in Once in a while I enjoy going fishing. [Mid-1800s] Also see every now and then; from time to time.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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