| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] for two [noun] | 10 |
|
| 2 | has [been] [vb pp] for two [noun pl] | 10 |
|
| 3 | has [been] [vb pp] for two year | 6 |
|
| 4 | has [been] [vb pp] for two years | 6 |
|
