| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of a three year | 17 |
|
| 2 | over a three year | 13 |
|
| 3 | for a three year | 10 |
|
| 4 | with a three year | 8 |
|
| 5 | on a three year | 5 |
|
