| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] for [det] years | 77 |
|
| 2 | [been] [vb pp] for many years | 54 |
|
| 3 | [been] [vb pp] for some years | 17 |
|
| 4 | [been] known for [det] years | 15 |
|
| 5 | [been] used for [det] years | 13 |
|
| 6 | [been] [vb pp] for several years | 6 |
|
