| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] at | 511 |
|
| 2 | [not/n't] been [v-ing] | 510 |
|
| 3 | [not/n't] [v-ing] at | 369 |
|
| 4 | [not/n't] been at | 50 |
|
