mysql> select name, count(concept_name_id) from concept_name where concept_id=6339 group by name;
+-------------------+------------------------+
| name              | count(concept_name_id) |
+-------------------+------------------------+
| PRENATAL VITAMINS |                    304 |
| VITAMINS          |                      1 |
+-------------------+------------------------+
2 rows in set (0.04 sec)