There are 8 to 12 chapters in the manual depending on the Unit. Some chapters are longer than others, but the smaller units might contain the most amount of new information to most students.
For this reason, we recommend spending an average of 8 hours per chapter. In sum, you should plan on approximately 64 to 96 hours of study for each unit. This, however, is a broad generalization.
You will need more study time if you do not have a strong wine background.