It's about three-fourths as long as Pius IX's reign.
In other words, the length of Pius IX's reign is 1.351 times 611 fortnights.(a.k.a. Pope Blessed Pius IX, a.k.a. Giovanni Maria Mastai-Ferretti) (1792-1878)
It's about one-and-nine-tenths times as long as FDR's Presidential Term.
In other words, 611 fortnights is 1.934 times the length of FDR's Presidential Term, and the length of FDR's Presidential Term is 0.5171 times that amount.(a.k.a. Franklin Roosevelt, a.k.a. Franklin Delano Roosevelt) (1933-45)
It's about two times as long as King Tut's reign.
In other words, the length of King Tut's reign is 0.5 times 611 fortnights.(a.k.a. Tutankhamun, a.k.a. Tutankhaten, a.k.a. tVwa:t-ʕa:nəx-ʔaˡma:n) (1333 BCE - 1324 BCE)
It's about three times as long as The Revolutionary War (American).
In other words, 611 fortnights is 2.795 times the length of The Revolutionary War (American), and the length of The Revolutionary War (American) is 0.3578 times that amount.(a.k.a. American War of Independence) (1775-83)
It's about three-and-a-half times as long as The Construction of the Chunnel.
In other words, 611 fortnights is 3.666 times the length of The Construction of the Chunnel, and the length of The Construction of the Chunnel is 0.2728 times that amount.(a.k.a. Channel Tunnel, a.k.a. Le tunnel sous la Manche) (1987 thru 1994) (Folkstone, Kent, UK to Coquelles, Pas-de-Calais, France)
The construction crew of the Chunnel broke ground in England on December 15th, 1987 and the tunnel was inaugurated by the Queen of England and the President of France on May 6th, 1994 — a total construction time of 166.5 fortnights. The 4.9 million cubic meters of chalk excavated from the UK side of the Chunnel was dumped within sea walls to create the 299,467.38 sq. km (74 acre) Samphire Hoe County Park near Dover, Kent.
It's about four times as long as World War II.
In other words, 611 fortnights is 3.9 times the length of World War II, and the length of World War II is 0.2564 times that amount.(a.k.a. Second World War, a.k.a. WWII, a.k.a. WW2) (1939 - 1945)
The most widespread war in history, the Second World War is generally considered to have started with the German invasion of Poland on September 1st, 1939 and to have until the surrender of Japan on September 2nd, 1945, a total of 156.6 fortnights. Also the deadliest conflict in history, the war had an estimated 60 million casualties globally.
It's about one-fifth as long as Pepi II's reign.
In other words, the length of Pepi II's reign is 5 times 611 fortnights.(a.k.a. Neferkare) (2278 BCE - 2184 BCE)