| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years it [vb -s] | 10 |
|
| 2 | [prep] [num] years it have | 10 |
|
| 3 | [prep] [num] years it has | 9 |
|
| 4 | for [num] years it [verb] | 8 |
|
| 5 | [prep] [num] years it [vb past] | 5 |
|
| 6 | of [num] years it [verb] | 5 |
|
