How often will social security review my disability claim ? (continuing disability review)

Trying to get approved for social security disability or SSI disability benefits can be daunting, due to these aspects (this is by no means a complete list):1. How long the process takes (which can cause considerable financial repercussions),2. The poor job the social security administration does with regard to explaining "how things work", 3. The fact that while your case is being processed,