| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] for many [noun pl] | 27 |
|
| 2 | has been [vb pp] for many year | 24 |
|
| 3 | has been [vb pp] for many years | 24 |
|
| 4 | has been used for many [noun] | 8 |
|
| 5 | has been known for many [noun] | 5 |
|
