Welcome to NGA,
@GGinDD.
Growing plumeria, a tropical plant, is surely going to be different than growing them here, in S. Florida. But as Daisy told you, plumeria typically will go dormant in the fall/winter, losing all or most of their leaves. Even here in Florida, the vast majority of my 300 plants are leafless. Without leaves, plumeria has little need for water. In fact, other than when it rains (all my plants are outside, in full sun), my plumeria get no water whatsoever. You should not be watering and shouldn't begin watering until you see new leaf-growth in the spring.
Also, plumeria anything but "inside" plants. They are tropical trees, requiring at least 6 hr. of direct sun to grow well and to bloom. When spring arrives, if you can find a spot outside so that your tree can get direct sun, put that tree outside.
