| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know how | 2440 |
|
| 2 | know how | 1381 |
|
| 3 | knew how | 648 |
|
| 4 | to know how | 592 |
|
| 5 | knows how | 439 |
|
| 6 | knowing how | 248 |
|
| 7 | known how | 122 |
|
