| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [det] [noun] a | 1947 |
|
| 2 | been [prep] [det] [noun] | 577 |
|
| 3 | been [prep] [det] a | 41 |
|
| 4 | been [prep] [noun] a | 34 |
|
