| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [noun] at [art] | 218 |
|
| 2 | [prep] [noun] [v-ing] at [art] | 197 |
|
| 3 | [prep] an [noun] [v-ing] [art] | 181 |
|
| 4 | [prep] an [noun] [v-ing] at | 18 |
|
| 5 | an [noun] [v-ing] at [art] | 17 |
|
