| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun sg] at [det] levels | 36 |
|
| 2 | of [noun sg] at [det] level | 34 |
|
| 3 | [prep] [noun sg] at all level | 30 |
|
| 4 | [prep] [noun sg] at [det] level | 21 |
|
| 5 | in [noun sg] at [det] level | 12 |
|
| 6 | [prep] [noun sg] at this level | 12 |
|
| 7 | for [noun sg] at [det] level | 8 |
|
