| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been go on since | 7 |
|
| 2 | have been go on since [noun] | 6 |
|
| 3 | have been go on since [adj] | 5 |
|
| 4 | have been go on since [noun prp] | 5 |
|
