Hmmm...None of the instinctual stackings for 9 seem to fit me. Here's the closest fit:
This could be problematic. The Sp/So description for 4 fit me very well (almost all of it would be bolded).Self-pres/Social
This subtype is the most
self-effacingof type Nine, possibly the least assertiveof all the enneagram types. They can feel as though they have been looked over and passed by. While they do desire attention and recognition, with the sexual instinct last in the stacking, they seldom actively pursue it. They feel as though it’s just not worth it. This subtype is usually very deliberate and methodical in their speech. They sometimes get frustrated because they don’t feel that they can say what they really want to say. They are therefore often very short and concise with their communication, not wanting to provoke any confrontation. But when given a chance and the time to express themselves, they can be quite talkative. While self-pres needs are important to this type, the fact that they are essentially Nines, sometimes causes them to put the needs of others before their own. When under stress, this type is likely to do busy work, anything that distracts them from their problems.
In relationships, the self-pres instinct combines with the merging qualities of the Nine to make a person committed and connected strongly in areas of security, home and other practical matters. They merge their environment with their loved ones. On the down side, this subtype can be passive-aggressive and withdraw under stress, holding back affection. They could possibly go long periods of time without talking to their spouse directly.