| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] at a [noun sg] | 911 |
|
| 2 | [v-ing] a [noun sg] [art] | 178 |
|
| 3 | at a [noun sg] [art] | 109 |
|
| 4 | [v-ing] at [noun sg] [art] | 16 |
|
