| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 's [been] going on [prep] | 26 |
|
| 2 | 's been going on [prep] | 26 |
|
| 3 | 's [been] going on for | 15 |
|
| 4 | 's [been] going on for | 15 |
|
