| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [vb pp] for [det] years | 33 |
|
| 2 | has been [vb pp] for [det] year | 31 |
|
| 3 | [vb -s] been [vb pp] for many year | 24 |
|
| 4 | [vb -s] been [vb pp] for some year | 8 |
|
| 5 | [vb -s] been used for [det] year | 7 |
|
| 6 | [vb -s] been known for [det] year | 6 |
|
