| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] for | 496 |
|
| 2 | had been [v-ing] [noun pl] | 145 |
|
| 3 | been [v-ing] [noun pl] for | 99 |
|
| 4 | had been [noun pl] for | 23 |
|
