| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period | 2785 |
|
| 2 | a [adj] period | 2542 |
|
| 3 | a two-year [noun] | 277 |
|
| 4 | a two-year [noun sg] | 270 |
|
| 5 | [art] two-year period | 44 |
|
| 6 | a two-year period | 33 |
|
| 7 | a two-year period | 33 |
|
