Charles Osborne holds the record for the ‘longest bout of hiccups’ – 68 years. He hiccuped up to 40 times a minute in the first couple decades but they slowed to 20 a minute as he got older. Doctors estimated he hiccuped nearly 600,000,000 times in his lifetime.
– WTF Fun Facts
Source: https://priceonomics.com/the-man-who-hiccuped-for-68-years/