a few hours; several hours
Refers to an approximate number of hours, typically more than two but not many. The exact number is vague and context-dependent.
会議は数時間続いた。
The meeting lasted for several hours.
I'll contact you again in a few hours.
This task takes a few hours.
A few hours later, I got a phone call.
He arrived here a few hours earlier.
The meeting continued for several hours.
I was made to wait for several hours at the hospital.