How long did it take to create battleships for World War 2?

About 3 years for a WWII modern steel battleship.

Notes:

Note that most Battleships and Cruisers were produced before the war and many served through its entirety. [1]

With the Washington Naval Treaty of 1922, the major navies of the world scaled back their battleship programs, with numerous ships on all sides scrapped or re-purposed. With extensions, that treaty lasted until 1936, when the major navies of the world began a new arms race. Famous ships like Bismark, Prince of Wales, and Yamato were all launched in the next few years. [2]