| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] this | 12 |
|
| 2 | have been used [prep] this | 12 |
|
| 3 | have been used for this | 6 |
|
| 4 | have been used for this | 6 |
|
| 5 | have been used [prep] this | 5 |
|
