There are statutory minimum waiting periods in most places, but almost every divorce takes at least twice that long unless both parties are actively moving it forward.
The safest plan for slowing it down is simply not to help it along. If her lawyer needs an appraisal on the house, don't arrange it for them. Let them subpeona your work for financial information rather than collecting it for them. And generally, get in the habit of not signing anything.
If you get served with a divorce complaint, you DO want to get a lawyer and respond to it. If you don't respond, they can get a summary judgement and that will be quick.
