water pumps,My water pump is leaking but I replaced timing belt and pump a year ago. Can I just replace the water pump this time?

was told the water pump is leaking. the previous owner replaced it and the timing belt about a year and a half ago. not under warranty so my question is can I just replace the water pump or do I have to replace everything again? car is running great just leaking fluid from the water pump. If so how labor intensive is the job? how many hours will this take to repair?

My car has 134000 miles.
My car has an automatic transmission.