A shame they both died before the census, as that means you won't have a birthplace for them.
On FamilySearch there's an Alice Wells baptised 16 September 1798 at Averham, parents John Wells and Ann. Averham is not very far from Farnsfield. No-one else names Alice Wells born about the right time, so this could be the one who married George. If you research this Alice Wells further you can see whether she grew up to marry anyone else.
There are a few possibles for George Holland so it's difficult to know which one it could be. There's a George Holland baptised 1803 at Newark upon Trent, which is close to Farnsfield. You could research them and see which you can eliminate and who you're left with.
You've posted this in Yorkshire (East Riding) though, so I'm wondering whether you know anything that means they weren't born in Nottinghamshire?
Regards,
Judy