How often do you get hypnic jerks?

'A hypnic jerk is an involuntary twitch of one or more muscles that occurs as a person falls asleep. It tends to occur in stages 1 or 2 of sleep and disappear in stage 3, which refers to rapid eye movement sleep. In other words, they occur when a person transitions from a wakeful state to a sleeping state'

i get them every night

How often do you get hypnic jerks?
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