No one can tell you what the proper watering schedule should be,
@jenjan12345. That depends on what the potting medium is, humidity, heat, sunlight..........all the things that go into "growing conditions". These plants are built to survive prolong droughts. That bulbous trunk is a water-storage unit. My plants are about the same size as yours. When the soil is completely dry I then wait another week or even two to water. During the spring/summer months, I might water every month. During the fall/winter months, I will water once every two months. But when I water, I do so thoroughly, often sitting the pots in a sink of tepid water for 5-10 minutes, with 1/4 recommended ratio of 20-20-20 fertilizer in that water. My soil mix is not very water-retentive and drains very quickly. Ere on the side of dry rather than wet.
For me at least, the rule of thumb is to re-pot when the plant becomes unstable, tipping the pot over because of the height/weight of the top-growth. That could be every year or two or even only after five years of growth. These plants don't seem to mind being root-bound. I use only clay pots since that additional weight helps evaporate water and adds weight for better stability.
