"dedicate two years" is a correct and usable phrase in written English.
It means to commit or devote a period of two years to a specific purpose or task. Example: "I have decided to dedicate two years of my life to volunteering in developing countries."
"Do you know what it's like to dedicate four years of your life?
I can't quite fathom why you'd choose to dedicate three years of your life to a degree that will award you the privilege of spending a lifetime huffing dust and scrabbling for cables under desks, only to be the person who everyone blames for everything in every office, everywhere.
The cornerstone of the new building was laid on Oct. 3, 1926, and the church was dedicated two years later, on Oct. 7, 1928...
Nonetheless, he has dedicated two years of his life to ensure that I had the best possible lawyers on this case, and to ensure that the press understood what was at stake here.
While he delights in the discomfort that "Rent Collection Courtyard" causes the Chinese authorities, he is dedicating two years to planning Olympic ceremonies that, whatever their specific content, will glorify the state.
The convention, four days of sparkling costumes, silent auctions, meticulous design competitions, live bands, living Barbies, workshops on hair restoration and limb reattachment, and sales, was conceived and staged by the Fashion Doll Club of the Rockies -- by Debbie Baker and Shantel Ballard, who dedicated two years to the effort.
The pair dedicated two years to the short-lived British America's Cup bid Team Origin to compete in the 2013 event; the team withdrew in October 2010 after controversial rules were unveiled for the event.
It was largely finished by 1834, but Prescott dedicated two years to abridging and redrafting it.
They also note that Matejko usually dedicated two years to paintings of that size; this one was completed in less than a year, during a period in which Matejko was working on other projects and suffering from stress and depression.
