| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] [noun sg] | 16 |
|
| 2 | have been used in [noun] | 10 |
|
| 3 | have been used for [noun] | 9 |
|
| 4 | have been used [prep] [noun pl] | 8 |
|
| 5 | have been used by [noun] | 6 |
|
