| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a three year [noun sg] | 82 |
|
| 2 | a three year [noun sg] | 82 |
|
| 3 | a three year period | 20 |
|
| 4 | a three year commitment | 6 |
|
| 5 | a three year contract | 5 |
|
