| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know how long | 174 |
|
| 2 | know how long | 174 |
|
| 3 | know [Wh adv] long | 174 |
|
| 4 | know [adv] long | 105 |
|
| 5 | knows [adv] long | 34 |
|
| 6 | knowing [adv] long | 11 |
|
| 7 | knew [adv] long | 9 |
|
| 8 | to know [adv] long | 6 |
|
| 9 | known [adv] long | 6 |
|
| 10 | know [adv] long | 6 |
|
