| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] a knock [prep] the | 87 |
|
| 2 | was a knock [prep] the | 87 |
|
| 3 | [was/were] a knock [prep] the | 87 |
|
| 4 | [was/were] a knock on the | 54 |
|
| 5 | [was/were] a knock on the | 54 |
|
| 6 | [was/were] a knock at the | 33 |
|
| 7 | [was/were] a knock at the | 33 |
|
