| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has occur in | 106 |
|
| 2 | [vb -s] occurred in | 106 |
|
| 3 | [vb -s] to occur in | 13 |
|
| 4 | [vb -s] occur in | 10 |
|
| 5 | does occur in | 10 |
|
| 6 | tends occur in | 6 |
|
