| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that have occurred | 117 |
|
| 2 | that have occurred | 52 |
|
| 3 | that [vb base] occurred | 52 |
|
| 4 | that [vb -s] occurred | 37 |
|
| 5 | that has occurred | 36 |
|
| 6 | that [vb past] occurred | 28 |
|
| 7 | that had occurred | 28 |
|
