How Safe Is Having 2 Doses Of Amoxicillin 250 Mg Within A Span Of 4 Hours?

Hi,My 5 yrs old had amoxicillin 250 mg 5 ml with in 4 hours (afternoon dose was given late at 5:30 pm and third dose of the day was taken at 9:30 pm before sleep. Is it ok to have two dose with in 4 hrs time which ideally used to be 6-7 hour gap between two doses. Pls advise.