| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not been [vb pp] for [num] years | 15 |
|
| 2 | [not/n't] been [vb pp] for [num] years | 15 |
|
| 3 | not been [vb pp] for [num] years | 8 |
|
| 4 | n't been [vb pp] for [num] years | 7 |
|
