| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] [prep] a [adj] period | 17 |
|
| 2 | [num] [prep] a five-year [noun] | 13 |
|
| 3 | [num] [prep] [art] five-year period | 6 |
|
| 4 | [adj] [prep] a five-year period | 6 |
|
| 5 | [num] [prep] [art] five-year period | 6 |
|
| 6 | [num] [prep] a five-year period | 5 |
|
