I was thinking about how The Hobbit (one book) was stretched over three movies. Bilbo's journey was actually longer than Frodo's - 14 months. April 27, 2941 - June 22, 2942.
http://middle-earthencyclopedia.weeb...o-baggins.html
http://lotrproject.com/thehobbit/map
http://answers.yahoo.com/question/in...6233355AAwqHw7
According to the Atlas of Middle-Earth, Frodo left Bag-End on Sept 23, 3018 Third Age, and the Ring was destroyed on March 25, 3019 Third Age, so seven months, give or take a few days. After the end of the War, the remaining Fellowship spent some time in Gondor, not leaving until July 19, and the hobbits arrived in the Shire on Nov.3, 3019. The departure from the Grey Havens did not occur until Sept. 21, year 1 of the Fourth Age. (3021 by Third Age reckoning)
Obviously, LOTR has way more threads in it, but Bilbo's trip took longer.