| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] three year | 27 |
|
| 2 | [vb past] [verb] three years | 27 |
|
| 3 | [vb past] [vb pp] three year | 21 |
|
| 4 | had [verb] three year | 19 |
|
| 5 | [vb past] spend three year | 5 |
|
| 6 | [vb past] spent three year | 5 |
|
