Interval time of formula feed

My newborn is 1 mth plus now with formula feed, one time can drink up to 90ml. But she is craving of milk every 1.5 to 2 hour ,means after 90ml feed, she crying for another 50ml feed in 1.5 to 2 hrs time. Without feed she can't sleep and keep crying too. Any one know what is standard interval time for formula feed? Some said 3 to 4 hours....but she really can't last for so long and unable finish all milk if I feed more in one session.