| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] for | 496 |
|
| 2 | had [been] [v-ing] [noun sg] | 233 |
|
| 3 | [been] [v-ing] for [noun sg] | 66 |
|
| 4 | had [been] for [noun sg] | 7 |
|
