| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] not been used for | 12 |
|
| 2 | have not been used for | 12 |
|
| 3 | had not been used for | 6 |
|
| 4 | [vb past] not been used for | 6 |
|
| 5 | not been used for [adj] | 7 |
|
