| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | study [prep] children 's | 17 |
|
| 2 | study of children 's | 17 |
|
| 3 | study of children 's | 17 |
|
| 4 | studies [prep] children 's | 10 |
|
| 5 | study [prep] children 's | 7 |
|
