| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [adj] [noun] | 4306 |
|
| 2 | been [adj] [noun] | 2084 |
|
| 3 | be extensive [noun] | 85 |
|
| 4 | [be] extensive [noun] | 85 |
|
| 5 | [been] extensive [noun] | 18 |
|
| 6 | been extensive [noun] | 18 |
|
