Hello everyone! Could you please tell me when the second primary teeth…

Hello everyone! Could you please tell me when the second primary teeth erupt in children? We have four primary teeth per tooth. The thing is that the child sleeps for 2 hours during the day and goes to bed at 3 or 4 o'clock and wakes up at 12 o'clock. He/She sleeps until 7 p.m. Especially at night it doesn't let us sleep and constantly fusses and cries if something is not right. It starts to pinch and bend. Does anyone else experience this? I think maybe to the teeth, although all the teeth seem to have come out.