| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [art] appropriate | 199 |
|
| 2 | at [art] appropriate | 199 |
|
| 3 | at the appropriate | 144 |
|
| 4 | at the appropriate | 144 |
|
| 5 | at an appropriate | 55 |
|
| 6 | at a appropriate | 55 |
|
