| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] for over [num] years | 20 |
|
| 2 | been [vb pp] for about [num] years | 6 |
|
| 3 | been [vb pp] for [adv] two years | 5 |
|
| 4 | been [vb pp] for nearly [num] years | 5 |
|
| 5 | been established for [adv] [num] years | 5 |
|
