How often do you have health check up for child age over 3 years old?

There are some booster shots that need to be given once the child is over three years old. Other than that I didn't take my three year old into the doctor unless I needed to -- if she was unwell etc. However I did monitor her weight monthly and her height every two months at home. If I felt there was cause for concern, then I would take her in to see the doctor.