"lengthy service" is correct and can be used in written English.
You can use it to refer to a long period of time spent providing service or working in a particular position. For example, "He was rewarded for his lengthy service in the military."
His return would seem to be predicated on lengthy service as a Yankees homer.
Johnson believes Henry does not deserve such treatment after his lengthy service with the club.
But he also cashed in some chits from his lengthy service to the Bush family.
Automakers say they collect customer data only with explicit permission, though that permission is often buried in lengthy service agreements.
As for the jurors, who had originally been told the trial was likely to be over by Christmas, their lengthy service will be rewarded.
We don't presume to be anything other than politicians, albeit possessed of whatever perspective comes from lengthy service on Capitol Hill and in the national political arena.
Gwenda Thomas is also leaving after lengthy services as deputy health and social services minister.
The duration of service receipt for these cases might mean that some have funding for postsecondary education services, some have disabilities requiring very lengthy services, and some might be "lost" to the VR agency whose staff had yet to close the case.
Facebook can bend the rules and get a lengthier service from founders than most, but you can't defy gravity forever.
But as soon as the election was over, according to White House spokesman Mike McCurry, Clinton began searching for ways to pay tribute to Dole for his lengthy public service, which included serving eight years in the House and 28 in the Senate.
Before the beauty pageant begins there is a lengthy church service.
