Thank you for your query
One of the reasons for having recurrent vomiting
is gastro-esophageal reflux. It can be diagnosed with a barium swallow (X-Ray taken while swallowing a dye) or a GER scan. But you can start general measures. Keep your daughter upright as much as possible. Make her sleep making an angle of 45 degrees with the bed surface. Give her small frequent meals rather than large meals. Prefer semi solids over liquids. A pediatrician
or a pediatric surgeon can also prescribe you a few medicines which may help.
Hope it helps
God Bless You