| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [art] appropriate level | 22 |
|
| 2 | at [art] appropriate level | 22 |
|
| 3 | at a appropriate level | 13 |
|
| 4 | at an appropriate level | 13 |
|
| 5 | at the appropriate level | 9 |
|
| 6 | at the appropriate level | 9 |
|
