| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have occurred [prep] [noun] | 138 |
|
| 2 | have [prep] recent [noun] | 60 |
|
| 3 | occurred [prep] recent [noun] | 10 |
|
| 4 | have occurred [prep] recent | 8 |
|
