| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [adv] happen that | 129 |
|
| 2 | [subord] [pron] [adv] happen | 90 |
|
| 3 | [subord] [pron] [adv] that | 17 |
|
| 4 | [subord] [pron] happen that | 11 |
|
