| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be happening in | 450 |
|
| 2 | [be] happening in | 450 |
|
| 3 | [is] happening in | 268 |
|
| 4 | is happening in | 185 |
|
| 5 | [was/were] happening in | 117 |
|
| 6 | was happening in | 108 |
|
| 7 | 's happening in | 83 |
|
| 8 | [been] happening in | 36 |
|
| 9 | been happening in | 36 |
|
| 10 | be happening in | 18 |
|
| 11 | [be] happening in | 18 |
|
| 12 | [am/are] happening in | 11 |
|
| 13 | are happening in | 11 |
|
| 14 | were happening in | 9 |
|
