Gabriel García Márquez, 1985. Florentino Ariza waits 51 years 9 months 4 days for Fermina Daza.
From Wikipedia
Love in the Time of Cholera is a novel written in Spanish by Colombian Nobel Prize–winning author Gabriel García Márquez and published in 1985. Edith Grossman's English translation was published by Alfred A. Knopf in 1988.