The phrase "a lengthy term of" is correct and usable in written English.
It can be used when referring to a prolonged duration or period associated with something, such as a contract, sentence, or commitment.
Example: "The company imposed a lengthy term of probation for employees who violated the code of conduct."
Alternatives: "an extended period of" or "a prolonged duration of".
But federal prosecutors asked in their own letter for "a lengthy term of imprisonment".
"Otherwise, clearly term of imprisonment and a lengthy term of imprisonment would be appropriate for a case like this".
In 2009, Brown assaulted his then-girlfriend Rihanna, and in 2015 finished a lengthy term of probation, community service and domestic violence classes.
That arbitration clause was likely buried deep in the fine print in a lengthy terms-of-service agreement.
A service, consumer, or employment arbitration agreement should be a separate stand-alone document containing meaningful captions to indicate its contents and not a part of another document, such as a lengthy terms-of-service agreement or employee handbook.
Bo spent seventeen years in the city of Dalian, a lengthy term in comparison to colleagues of the same rank, who are often transferred to different locales throughout their careers.
The historic judgment leaves Charles Taylor, the former president of Liberia, facing a lengthy term in a British prison and will set a precedent that heads of state can no longer consider themselves immune to international justice.
A third defendant in the robbery and killing of Border Patrol agent Robert Rosas was sentenced Thursday to a lengthy term in federal prison.
Once the owner of Russia's largest energy company, Yukos Oil, he was tried and sentenced to a lengthy term in a Siberian prison.
To the Florida appeals court, "Graham applies not only to life without parole sentences, but also to lengthy term-of-years sentences that amount to de facto life sentences," and "a de facto life sentence is one that exceeds the defendant's life expectancy".
