A relatively permanent change in the frequency of occurrence of a specific individual behavior is referred to as:

A) learning
B) vicarious learning
C) classical conditioning
D) self-efficacy

The definition given in the question fits best with the concept of learning, which refers to a relatively permanent change in behavior that occurs as a result of experience or practice. Vicarious learning and self-efficacy are related concepts, but they do not fully capture the idea of a change in the frequency of occurrence of a specific behavior. Classical conditioning involves the learning of associations between stimuli and responses, rather than a change in behavior frequency.