Thank you for your query and sorry for not responding to it earlier.
As your daughter is having repeated bouts of dizziness
over the past 9 months as mentioned in your query she must have been examined by doctors and, I presume, the doctors must have said everything is normal. You can understand the limitation of this platform in providing you a definite cause for the problem and a solution without a thorough examination of the child.
I suggest that you discuss this issue with your doctor and request for a MRI
scan apart from a thorough neurological examination so that a possible cause for this phenomenon can be found.
I hope I have answered your query to your satisfaction.
Wishing your daughter all the best.