About 0.285% or 2.85‰ (!). For a 200lbs (90kg) person about 14 drinks[0] for a 120lbs (55kg) person about 11 drinks.
TL;DR: The issue was resolved with a low carb diet (about 6 months) and putting her on courses of fluconazole.
[0]1 drink = a 12-ounce (350 ml) beer or 5 ounces of wine (140 ml) http://www.clinlabnavigator.com/alcohol-ethanol-ethyl-alcoho...