| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know how long i | 19 |
|
| 2 | do n't know [Wh adv] long i | 19 |
|
| 3 | do n't know how long i | 19 |
|
| 4 | do n't know [adv] long i | 19 |
|
| 5 | do n't know [adv] long i | 17 |
|
