| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it not occur | 5 |
|
| 2 | it [verb] not occur | 71 |
|
| 3 | it [vb past] not occur | 61 |
|
| 4 | it do not occur | 47 |
|
| 5 | it did not occur | 37 |
|
| 6 | it had not occur | 24 |
|
| 7 | it have not occur | 24 |
|
| 8 | it [modal v] not occur | 10 |
|
| 9 | it [vb mod] not occur | 10 |
|
| 10 | it does not occur | 10 |
|
| 11 | it [vb -s] not occur | 10 |
|
| 12 | it not occur [prep] | 5 |
|
| 13 | it not occur to | 5 |
|
| 14 | it not occur to | 5 |
|
| 15 | it not occur [prep] | 5 |
|
