Once a skill is known, further study of that skill has no effect.
Gains in proficiency come from using or practicing the skill.
Each time a noble uses a skill successfully, his experience level for the skill is increased by one. If a skill is used more than once per turn, only the first success will count towards experience. Projects which take more than one month to complete, such as shipbuilding or castle construction, only count towards experience when the project is finished.
Some skills may also be practiced (see practice). Skills that may
be practiced list a practice time and cost. Each completion of practice
raises a noble’s skill level by one. There is no limit to the amount of
time a noble can spend practicing.
Level Description ----- ----------- 0-1 apprentice 2-3 journeyman 4-5 adept 6-8 master 9+ grand master
Experience will speed work with some skills. For example, a master shipbuilder will be able to construct a hull somewhat faster than an apprentice. Some skill uses benefit more from experience than others.
The skill listing for a noble shows his level of experience in each skill.