How many hours of sleep is considered insomnia?

[martinahandy]

Insomniaalso varies in how long it lasts and how often it occurs. It can be short-term (acute insomnia) or can last a long time (chronic insomnia). It can also come and go, with periods of time when a person has no sleep problems. Acute insomnia can last from one night to a few weeks. Insomnia is called chronic when a person has insomnia at least three nights a week for three months or longer.

https://www.youtube.com/watch?v=0tzhxL8ytXQ