using a high frenquency behavior as a reinfocer for a less frequent behavior is an example of ?

Using a high frequency behavior as a reinforcer for a less frequent behavior is an example of differential reinforcement of other behavior (DRO). This technique involves reinforcing a behavior that is different from the target behavior in order to decrease the occurrence of the target behavior. By reinforcing a high frequency behavior, individuals are more likely to engage in that behavior instead of the less frequent behavior.

differential reinforcement of low rate (DRL)