| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be used [prep] a [noun] | 1121 |
|
| 2 | be [prep] a [num ord] [noun] | 39 |
|
| 3 | used [prep] a [num ord] [noun] | 26 |
|
| 4 | be used [prep] a [num ord] | 21 |
|
| 5 | be used [prep] [num ord] [noun] | 6 |
|
