If by prevalent you mean which one has been produced the most, I'd probably say the CZ. S&W only has a few 9mm handguns that were hammer fired, 9mm 1911's are extremely difficult to find, and the Browning HP is pretty difficult to find as well. That really only leaves the CZ.
They were not choices in the original poll the OP posted. The choices were originally:baalor said:Didnt you sort of forget about Beretta and Sig???