| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has occurred [coord] a [noun] | 22 |
|
| 2 | has occurred [conj] a [noun sg] | 22 |
|
| 3 | has occurred or a [noun] | 21 |
|
| 4 | has occurred [conj] a error | 21 |
|
| 5 | has occurred or a [noun] | 21 |
|
| 6 | has occurred [conj] an [noun] | 21 |
|
| 7 | has occurred [conj] a error | 21 |
|
