I've been incorporating visiting villagers into my daily routine in my attempts to get new DIY recipes. When I find one crafting I keep checking to see if other ones are crafting. What I'm wondering is: is this a waste of time? Is there only ever going to be 1 villager crafting at a time? Because from what I observed that's been the case so far.

there's only ever one villager crafting at a time, but it's worth it to go back into their houses every few hours because sometimes a new villager will be crafting