| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it for [adj] year | 97 |
|
| 2 | it for [num] year | 71 |
|
| 3 | it for twenty [noun] | 16 |
|
| 4 | [pron] for twenty year | 14 |
|
| 5 | [pers pn] for twenty year | 12 |
|
| 6 | it [prep] twenty year | 7 |
|
| 7 | it [prep] twenty year | 7 |
|
| 8 | it for twenty year | 6 |
|
| 9 | it for twenty year | 6 |
|
| 10 | it for twenty year | 6 |
|
