That’s how often the technician told me I was having an apnea during the first half of last night. In case you haven’t researched it that’s a LOT! They consider someone has a problem if they have more than 5 an hour. I have 5 in under 3 minutes. At least that explains why I’m tired in the morning.
At 1am I was fitted with a CPAP mask and then refitted every 10 minutes for the next hour and a half until we found one that sealed around my beard enough.  Once I got used to the feel I fell asleep around 2:30 and was awakened at 5am. I haven’t had 2 1/2 hours of sleep that good in ages. Now I’ve just got to get one for here at home.