| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] for | 496 |
|
| 2 | had [been] [v-ing] the | 346 |
|
| 3 | [been] [v-ing] for the | 193 |
|
| 4 | had [been] for the | 27 |
|
