| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [verb] two years | 18 |
|
| 2 | [vb base] [verb] two year | 18 |
|
| 3 | [vb base] [vb pp] two year | 13 |
|
| 4 | have [verb] two year | 8 |
|
| 5 | 've [verb] two year | 6 |
|
