I've built an underground iron golem farm (making sure every door in the village has one block to the outside that is lit by the sunlight), and have cured 2 zombie villagers. I've put them in the chamber and awaited.
I'm at the tenth day (2 hour and 30 minutes+) since they began showing hearts on their head and they still haven't bred.
Q: What's the minimum and maximum required time for them to breed (assuming 48 doors/houses are provided)? Is there anyway to speed the process up?
I've tried taking a brief look at the villager minecraft wiki page but I couldn't find any information.