| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be used [prep] a [noun sg] | 523 |
|
| 2 | used [prep] a [num ord] [noun sg] | 26 |
|
| 3 | be used [prep] a [num ord] | 13 |
|
| 4 | be [prep] a [num ord] [noun sg] | 6 |
|
