| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [v-ing] | 265 |
|
| 2 | [adv] [v-ing] been | 157 |
|
| 3 | at [adv] been | 23 |
|
| 4 | at [v-ing] been | 19 |
|
