A 4-month-old baby typically eats about every 2 to 3 hours during the day if breastfed, and usually every 3 hours if formula-fed. This translates to roughly 8 to 12 feedings in a 24-hour period. At each feeding, a breastfed baby might consume about 3 to 4 ounces, while a formula-fed baby might take about 4 to 6 ounces. Overnight, breastfed babies may eat every 2 to 6 hours, and formula-fed babies every 3 to 8 hours. Feeding frequency can vary based on the baby's individual needs and growth spurts. It's important to feed on demand and follow the baby's hunger cues. Babies at this age may also have "cluster feedings" (feeding more frequently for short periods), and some may stretch out feedings or sleep for longer stretches at night as they grow. In summary:

• Breastfed: every 2 to 3 hours during the day, every 2 to 6 hours overnight, 3 to 4 ounces per feeding
• Formula-fed: every 3 hours during the day, every 3 to 8 hours overnight, 4 to 6 ounces per feeding
• Total feedings per day: around 8 to 12

These are general guidelines, and your baby's feeding pattern may differ. Consult your healthcare provider if you have concerns about your baby’s eating habits.