| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] have been [adj] for | 61 |
|
| 2 | [noun pl] have been responsible for | 12 |
|
| 3 | [noun pl] have been available for | 11 |
|
| 4 | years have been [adj] for | 6 |
|
