| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know how long [pers pn] | 69 |
|
| 2 | know [Wh adv] long [pers pn] | 69 |
|
| 3 | know [Wh adv] long i | 21 |
|
| 4 | know [Wh adv] long it | 20 |
|
| 5 | know [Wh adv] long he | 13 |
|
| 6 | know [Wh adv] long she | 7 |
|
