| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] [prep] a [noun] | 4202 |
|
| 2 | been [vb pp] [prep] a [noun] | 3790 |
|
| 3 | be used [prep] a [noun] | 1323 |
|
| 4 | [be] used [prep] a [noun] | 1323 |
|
| 5 | been used [prep] [art] [noun] | 296 |
|
| 6 | been use [prep] a [noun] | 141 |
|
| 7 | been used [prep] a [noun] | 139 |
|
| 8 | [been] used [prep] a [noun] | 139 |
|
