| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [noun] | 80003 |
|
| 2 | on [prep] a [noun] | 1266 |
|
| 3 | on [prep] [noun] [noun] | 891 |
|
| 4 | on a [noun] [noun] | 92 |
|
