| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] for many [noun pl] | 22 |
|
| 2 | had been [verb] for many years | 18 |
|
| 3 | had been [vb pp] for many [noun pl] | 14 |
|
| 4 | had been [v-ing] for many [noun pl] | 8 |
|
