| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] for [num] year | 43 |
|
| 2 | had been [verb] for [num] years | 43 |
|
| 3 | had been [v-ing] for [num] year | 25 |
|
| 4 | had been [vb pp] for [num] year | 18 |
|
| 5 | had been [verb] for two year | 7 |
|
| 6 | had been [verb] for seven year | 5 |
|
| 7 | had been [verb] for thirty year | 5 |
|
