| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] for | 496 |
|
| 2 | had been [v-ing] [noun] | 490 |
|
| 3 | been [v-ing] for [noun] | 301 |
|
| 4 | had been for [noun] | 44 |
|
