| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] for [noun] | 32 |
|
| 2 | been [v-ing] for an [noun] | 27 |
|
| 3 | has been [v-ing] an [noun] | 12 |
|
| 4 | has been [v-ing] for an | 7 |
|
