Hirers of ghostwriters divide on wanting the best critical document or avoiding a practice-disrupting routine document. The wish pertaining decides the hours a project needs. Routine projects carry routine expectations, an unimportant demurrer going for five or six hours.
On a critical motion or appeal, the attorney would like victory assured to a practical certainty, a goal approachable but time-consuming to attain because the ghostwriter must pursue deeper understanding of the issues. He must not only know the dispositive holdings but understand why they must hold, understandings crucial to persuading the judge, rather than over-powering the opposition. Only if you persuade the judge can you be sure of prevailing.
The relationship is not linear between the ghostwriter's expertise and the hours needed to draft a critical document. With the writer's quickening apprehension of case law, he becomes more efficient over a five to ten year period. After that the writer continues to learn how to improve documents, so his best work takes longer.