| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [noun] | 49708 |
|
| 2 | been a [noun] | 7184 |
|
| 3 | been [v-ing] [noun] | 2055 |
|
| 4 | been [v-ing] a | 1008 |
|
