I'm going to take a guess at somewhere around 20 times. Back in primary school (90s for me) I would have it every other month consistently. The last time I recall having it "back then", it put me in hospital for a few days as a result being unable to swallow ANYTHING (even my own saliva) for about 4 days, leaving me disturbingly dehydrated and malnourished....they said the next time it happens, THEY'RE COMING OUT....
Fast forward to March last year, which is the next time I got it lol. I think the doc scared them a little. They don't take them out these days unless it's SERIOUS and you demand it. Meh, I was fine in a few days with antibiotics and some rest.
Copped it again end of October last year during the last few days of an 11 night cruise, and right before I started my current job lol...did NOT want to call in sick for my first week, so I gargled the f**k out of salt water, smashed the erythromycin hard, and rested well. Also forced food down my throat, ignoring the pain (which wasn't that bad anyway).
f**king hope I don't get it again. Hate that shit.