| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] a long time | 8 |
|
| 2 | which [verb] [art] long time | 8 |
|
| 3 | which [verb] [art] long time | 7 |
|
| 4 | which take [art] long time | 5 |
|
