How does the process of magic regeneration work in the world of fantasy literature?

In the world of fantasy literature, magic regeneration typically involves the replenishment of a magic user's energy or power over time. This process can vary depending on the specific rules and systems of magic in the story, but it often involves resting, meditating, or drawing energy from natural sources to restore magical abilities. Some stories may also include magical items or rituals that aid in the regeneration of magic.