| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used for [adj] [noun] | 59 |
|
| 2 | had been for [adj] [noun] | 27 |
|
| 3 | had been used for [adj] | 14 |
|
| 4 | had been used for [noun] | 11 |
|
