| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] on for | 118 |
|
| 2 | [been] [v-ing] on for | 118 |
|
| 3 | [been] going on for | 95 |
|
| 4 | [been] working on for | 10 |
|
