For the entire duration of the Pacific War (December 7, 1941 - September 2, 1945), Nagato was docked for a total of seven times.
March 15, 1942 - Docked at Kure for refitting, she was undocked on April 9, 1942. July 18, 1942 - Docked at Kure for maintenance, she was undocked on July 22, 1942. January 25, 1943 - Docked at Kure for maintenance, she was undocked on February 2, 1943. March 31, 1943 - Docked at Kure for refitting, she was undocked on June 6, 1943. March 30, 1944 - Docked at Seletar for maintenance, she was undocked on April 13, 1944. June 27, 1944 - Docked at Kure for refitting, she was undocked on July 8, 1944. November 25, 1944 - Docked at Yokosuka for maintenance, on that day she served as a floating anti-aircraft battery and never leaved the dock until she was captured by the Americans on August 30, 1945.
This is another interesting fact about the most-lovable battleship, Nagato-san.