WHo is Fred and assistant in their joke shop?

It seems you're thinking of a classic comedy duo, but there's no famous "Fred" and assistant who run a joke shop.

Could you be thinking of one of these duos?

* Abbott and Costello: Known for their fast-paced, silly humor, they had a famous "Who's on First?" routine.

* Laurel and Hardy: This duo was known for their slapstick comedy and endearing characters, Stan Laurel and Oliver Hardy.

* The Three Stooges: This trio, Moe, Larry, and Curly, were known for their physical comedy and chaotic routines.

If you have more details about the joke shop, like a specific location or era, it might help narrow down the possibilities.