Question: What are the code and description of the most frequent behavior incident type?
SQL: SELECT T1.incident_type_code ,  T2.incident_type_description FROM Behavior_Incident AS T1 JOIN Ref_Incident_Type AS T2 ON T1.incident_type_code  =  T2.incident_type_code GROUP BY T1.incident_type_code ORDER BY count(*) DESC LIMIT 1