Depends on the airline and the size of the country.
During June 1981 (IIRC) SaudiArabian received the last of their L1011 aircraft.
The last two were put into service straight away on both domestic and international routes, which were expanded at about the same time.
Crews were kept quite busy and the airplanes were not on the ground much....except for one small incident wherein one new SV
TriStar ran over a Datsun pick-up truck, which a careless ground engineer had parked in front of the left main gear...and nobody noticed.
One rather flat pick-up truck, no higher than approximately 14 inches in height.
Damage to airplane?
Damage to airplane tires?
Damage to careless ground engineer...Sacked forthwith.