Where do I check for the visa priority date for employment based EB3 category for Nepal? My friends were telling me that it is current for EB1 and EB2 but there maybe some wait for EB3.

Can someone who has been through this shed some light on this? Also does it make sense to do premium processing on I140 if there is a wait on the visa priority date for like 2-4 months?

I really appreciated your input here..Thanks.