Part-Time Childcare in Arlington/Alexandria Area?

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Hi,
Can anyone recommend a good part-time option for childcare of an infant in the No. Virginia area? It seems none of the centers offer part-time and so we'd have to use a private home daycare. This worries me a bit, though that's probably unfair. If anyone has had a good experience at a private daycare that offers part-time options, please share!

Thank you!