| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [noun] | 3542 |
|
| 2 | have been used [prep] | 854 |
|
| 3 | been used [prep] [noun] | 308 |
|
| 4 | have used [prep] [noun] | 46 |
|
