| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] a lower | 53 |
|
| 2 | [be] [vb pp] [prep] a level | 36 |
|
| 3 | [vb pp] [prep] a lower level | 14 |
|
| 4 | [be] [prep] a lower level | 8 |
|
| 5 | [be] [vb pp] [prep] lower level | 7 |
|
