Time and Skill Checks

Using a skill might take a round, several rounds, or even longer. It might take no time at all. Types of actions define how long activities take to perform within the framework of a combat round (6 seconds) and how movement is treated with respect to the activity. See the skill description for specifies on how long a skill takes to use.
In general, using a skill that requires concentration while in close combat is dangerous. Nearby op-ponents can make attacks of opportunity against a character when he or she lets his or her guard down.