Wormholes come in various sizes allowing the passage of large, medium, or small ships. The permanent wormholes are fixed in location and size. I haven't counted but there are likely over 200 permanent wormholes.
Zhatt's Transit Map with some Au distance indicators superimposed.
An exploration sub-task is the seeking out and discovery of temporary wormholes. There will probably be lots of them. I expect there will be many hundreds of them just waiting to be discovered. They will however be temporary and maybe even mobile on one end or both. That kinda makes them slippery things.
I expect that there will be a lot of temporary wormholes because there are several wormhole detecting ships. The Anvil Carrack, RSI Constellation Aquilla, Misc Freelancer DUR, and possibly the Anvil Terrapin are ships capable of wormhole detection. There may also be modules that ships can attach which could be helpful in finding wormholes ... but I'm currently thinking, not.
Anvil Carrack approaching a wormhole.
Simply because of the number of wormhole-detecting ships there will be lots of wormholes to discover. But they will be fleeting, I'm sure. Based on the fact that knowledge of them is to have considerable implied value, I'd hazard a guess that they will have a duration in the neighborhood of weeks to months. The larger holes being longer lived than the smaller ones.
Why, you ask? Well, that's just the way I would do it were I the great CR god. Anyway, that will do until we know for sure.
I expect that wormholes will be of similar distance to other, permanent wormholes in the area. I do not expect that one will travel to the other side of the Verse relative to one's current position. The programming of that might be a bit tricky. Each wormhole origin system probably just have a short list of potential wormhole destination systems. Keeps things tidier this way.
Putting a value on transient wormhole locations is another tricky bit of business. Initially the UEE will simply pay a set price thus establishing a floor value. But as more citizens join the Verse and organizations tend to grow larger then there may be logical reasons for one organization to pay bigger bucks for some wormhole information.