The longest recorded time for someone to have the Hiccups is 69 years:

Charles Osborne (1894-1991) of Anthon, Iowa, the US, started hiccupping in 1922 while attempting to weigh a hog before slaughtering it. He was unable to find a cure, and continued hiccupping until February 1990, a total of 68 years. During the first few decades, he hiccupped up to 40 times a minute, slowing to 20 a minute in later years.