| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] on | 585 |
|
| 2 | [v-ing] on it | 447 |
|
| 3 | [been] [v-ing] it | 391 |
|
| 4 | [been] on it | 23 |
|
