| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun sg] | 465207 |
|
| 2 | on [prep] a | 2373 |
|
| 3 | on [prep] [noun sg] | 2145 |
|
| 4 | on a [noun sg] | 733 |
|
