| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [indef pn] [adv] to | 543 |
|
| 2 | [adv] happen to | 484 |
|
| 3 | [indef pn] happen to | 138 |
|
| 4 | [indef pn] [adv] happen | 76 |
|
