Nitwit

A nitwit is a villager that does not trade. Unlike regular unemployed villagers, nitwits do not seek employment, spending most of their time walking around, talking to other villagers, or sleeping.

In Java Edition, due to a bug, nitwits cannot spawn in through breeding.[1] As such, they can only be found naturally or by curing naturally spawned zombie villagers. Zombie villagers can also be spawned as babies, so this is the only way to encounter baby nitwits in Survival mode.

In Bedrock Edition, every baby villager has a 10% chance to become a nitwit when they become an adult, as well as having a different sleep schedule where they wander around the village for about 2000 ticks (1 minute 40 seconds) after other villagers go to sleep, before seeking a bed. If they can claim a bed, they arise in the morning 2000 ticks after the rest of the village wakes up.