Don't get me started about people who pay diploma mills for a Doctor of Divinity degree. I mean, really. Don't get me started. Especially don't get me started about people who get their "doctorates" through correspondence courses from unaccredited schools. Makes my blood boil.
A legitimate doctorate usually takes at least two years of intense work. A candidate may or may not write a dissertation, depending on the seminary, but he or she will do enough work to make up for a dissertation. The candidate will also usually take classes in New Testament Greek and in Hebrew in order to learn to translate the Bible from the original language.