Is a unicorn rarer than a dragon in Adopt Me?

Excuse me, could you clarify for me? Are you asking if, in the context of the game "Adopt Me," the virtual creature known as a unicorn is considered to be more rare or less common than the virtual creature known as a dragon? I'm curious because the rarity of these creatures in the game could potentially affect their value or desirability among players. If you're looking for a direct comparison based on the game's mechanics, it might be helpful to look at the drop rates for these creatures or their relative availability in the game's marketplace.