American Charles Osborne had hiccups for 68 years, from 1922 to February 1990,  and was entered in the Guinness World Records as the man with the longest attack of hiccups, an estimated 430 million hiccups.  In 2007, Florida teenager Jennifer Mee gained media fame for hiccuping around 50 times per minute for more than five weeks.   Christopher Sands, a Briton, hiccupped an estimated 10 million times in a 27-month period from February 2007 to May 2009. His condition, which meant that he could hardly eat or sleep, was eventually discovered to be caused by a tumor on his brain stem pushing on nerves causing him to hiccup every two seconds, 12 hours a day. His hiccups stopped in 2009 following surgery. 
To get rid of hiccups by reducing your acid reflux, stick to unprocessed, organic foods that are free from GMOs as much as possible. Increase your fiber intake to support healthy bacteria in your gut and eat plenty of probiotic foods . You also want to reduce grains, especially when refined, and sugar consumption, eat high-quality protein (stick to grass-fed beef over conventional beef) and reduce your intake of refined vegetable oils, like canola oil. Some people also find that carbonated drinks, alcohol and spicy foods can lead to hiccups, so do your best to minimize those foods and drinks in your diet.