| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it takes [adv] [num] year | 6 |
|
| 2 | it takes [adv] [num] year | 6 |
|
| 3 | it takes about [num] year | 5 |
|
| 4 | it takes about [num] year | 5 |
|
