Minecraft wiki entry for Before_1.18, associated text: Dry biome clusters: desert (3 times), savanna (2 times), plains
Rare dry biome clusters: 2/3 badlands (0.9% of the final map)
Medium biome clusters: forest, dark forest, birch forest, windswept hills, swamp, plains
Rare medium biome clusters: jungle (1.5% of the final map)
Cold biome clusters: forest, windswept hills, taiga, plains
Rare cold biome clusters: giant tree taiga (1.6% of the final map)
Frozen biome clusters: snowy plains (3 times), snowy taiga