| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] level [prep] [noun] [verb] | 367 |
|
| 2 | [adj] [noun] [prep] [noun] required | 117 |
|
| 3 | [adj] level [prep] [noun] [vb pp] | 98 |
|
| 4 | [adj] level [prep] [noun] require | 12 |
|
