| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been used [prep] [noun prp] | 14 |
|
| 2 | had been used [prep] [noun sg] | 14 |
|
| 3 | had been used by [noun] | 13 |
|
| 4 | had been used [prep] [noun pl] | 13 |
|
| 5 | had been used for [noun] | 11 |
|
| 6 | had been used in [noun] | 8 |
|
