| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] at [art] time | 226 |
|
| 2 | [vb base] at [art] time | 72 |
|
| 3 | [vb base] [v-ing] at [art] | 71 |
|
| 4 | [vb base] [v-ing] [art] time | 7 |
|
