| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how long did it take | 35 |
|
| 2 | how long did it take | 35 |
|
| 3 | [Wh adv] long did it take | 35 |
|
| 4 | [adv] long did it take | 35 |
|
| 5 | long did it take [pers pn] | 17 |
|
| 6 | long did it take [pron] | 17 |
|
| 7 | long did it take you | 16 |
|
| 8 | long did it take you | 16 |
|
