Can. 1153 §1. If either of the spouses causes grave mental or physical danger to the other spouse or to the offspring or otherwise renders common life too difficult, that spouse gives the other a legitimate cause for leaving, either by decree of the local ordinary or even on his or her own authority if there is danger in delay.
There it is, in canon law: You have the authority to leave on your own without permission from anyone if there is danger in delay. Just the knowledge that any day could be the day you will be abused again is harmful, even if “it can go months without abuse”. Verbal abuse or the threat of abuse is abusive, too, so don’t think that it isn’t “real” abuse unless there is a physical attack. If you are in the least uncertain, talk to your pastor and he will assure you that you have permission to leave immediately.
Please leave ASAP! I would highly encourage you to seek advice from a local crisis center, as they have a lot of experience in the safest ways to leave a dangerous spouse. Don’t delay. Call them right away. If you can’t find a local number, the national crisis web site can help you:
thehotline.org/get-help/help-in-your-area/