My four month old only having 60ml 9 times a day

A. 60 ML is quite less for the child in this age should be at least 120 ML but looking at the way that you are mentioning it seems like your child is having 2 1/2 hours or so it’s not a problem because within five hours if your child is consuming 120 ML is okay also if the child is gaining at least half a kilo kilogram every month then this would be more justified