| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] many years | 68 |
|
| 2 | been [vb pp] for many years | 54 |
|
| 3 | been [vb pp] over many years | 12 |
|
| 4 | been used [prep] many years | 12 |
|
| 5 | been known [prep] many years | 10 |
|
