| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] for [noun pl] | 103 |
|
| 2 | had been [vb pp] for [noun pl] | 61 |
|
| 3 | had been [v-ing] for [noun pl] | 42 |
|
| 4 | had been [verb] for years | 28 |
|
| 5 | had been [verb] for months | 8 |
|
| 6 | had been [verb] for weeks | 7 |
|
| 7 | had been [verb] for days | 7 |
|
| 8 | had been [verb] for centuries | 7 |
|
| 9 | had been [verb] for decades | 5 |
|
