| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did n't [verb] | 33365 |
|
| 2 | did n't [vb infin] | 33284 |
|
| 3 | do n't happen | 288 |
|
| 4 | [verb] n't happen | 288 |
|
| 5 | did [adv] happen | 209 |
|
| 6 | did [not/n't] happen | 205 |
|
| 7 | did not happen | 205 |
|
| 8 | did n't happen | 110 |
|
| 9 | [vb past] n't happen | 110 |
|
