| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has been [vb pp] for [adj] | 30 |
|
| 2 | it has been [verb] for [det] | 24 |
|
| 3 | it has been [verb] for some | 12 |
|
| 4 | it has been know for [adj] | 12 |
|
| 5 | it has been [verb] for some | 12 |
|
| 6 | it has been known for [adj] | 12 |
|
| 7 | it has been [verb] for many | 10 |
|
| 8 | it has been [verb] for many | 10 |
|
| 9 | it has been [verb] for [num] | 8 |
|
| 10 | it has been [v-ing] for [adj] | 7 |
|
| 11 | it has been [verb] for [adj] | 5 |
|
