| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used [prep] [noun] [noun] [prep] | 223 |
|
| 2 | been [prep] [noun] [noun] [prep] | 114 |
|
| 3 | been used [prep] [noun] [prep] | 105 |
|
| 4 | been used [prep] [noun] [noun] | 70 |
|
