Certified GKH Gardening Expert
Generally, 90 to 120 days is sufficient. Manures naturally contain bacteria such as E. coli and many others that will often harm humans if not composted correctly.
Generally speaking, I would only recommend raw manure if you have absolutely NO underlying health problems, take no medications, and have no other reason to believe that you have a compromised immune system.
If you intend to consume anything grown from this, it is even more important to let it age, as these risks increase dramatically.
Here are some articles that will help: