| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [vb pp] for [num] years | 18 |
|
| 2 | had been [vb pp] for [det] years | 18 |
|
| 3 | had been [vb pp] for many years | 11 |
|
| 4 | had been [vb pp] for many years | 11 |
|
