| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used [to-vb] [art] [noun] | 123 |
|
| 2 | had been [to-vb] [art] [noun] | 63 |
|
| 3 | had been used [to-vb] [art] | 21 |
|
| 4 | had been used [to-vb] [noun] | 15 |
|
| 5 | had used [to-vb] [art] [noun] | 8 |
|
