| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [adv] | 762 |
|
| 2 | why did [not/n't] | 752 |
|
| 3 | why did not | 751 |
|
| 4 | why did n't | 744 |
|
| 5 | why did [adv] | 10 |
|
| 6 | why did not | 7 |
|
