| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for use | 26 |
|
| 2 | have been [verb] for use | 26 |
|
| 3 | have been [verb] for use | 26 |
|
| 4 | has been [verb] for use | 14 |
|
| 5 | had been [verb] for use | 6 |
|
| 6 | have been develop for use | 5 |
|
| 7 | have been developed for use | 5 |
|
| 8 | have been [verb] for use | 5 |
|
