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Wiktionary
wax and wane

vb. 1 To progress through phases. 2 Alternating.

Wikipedia
Wax and Wane

Wax and Wane (Traditional Chinese: 團圓) is a 2011 Hong Kong television drama produced by Television Broadcasts Limited (TVB), with Nelson Cheung serving as the executive producer. The drama follows the story of two rival families, dealing with themes of revenge, greed, business affairs, and family.

Usage examples of "wax and wane".

You and Stettin have discovered that your abilities wax and wane, for unknown reasons.

She gave me a weak smile, but I saw it wax and wane with the siren.

Why did no moon rise and set, wax and wane, in the country of the Ashioi?

The Dark Moon did not wax and wane in the sense that the other moons did - it was always black - but its unseen cycles were still included in the astrological calculations that ruled the people of Vadanis and the outer islands.

If all of Luke's and Mara's instincts were wrong and the illness wasn't linked to something the Yuuzhan Vong had introduced to the galaxy, her vitality at least appeared to wax and wane in accordance with the invasion.