| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used for | 195 |
|
| 2 | have been for [det] | 93 |
|
| 3 | been used for [det] | 35 |
|
| 4 | have been used [det] | 7 |
|
| 5 | have used for [det] | 5 |
|
