| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj] year period | 66 |
|
| 2 | [noun] [prep] a three year [noun sg] | 29 |
|
| 3 | [noun] [prep] a three year [noun] | 29 |
|
| 4 | [noun] [prep] a three [noun sg] period | 20 |
|
| 5 | [noun] [prep] a three [noun] period | 20 |
|
| 6 | [noun] [prep] [art] three year period | 19 |
|
| 7 | [noun] [prep] a three year period | 14 |
|
| 8 | [noun] [prep] a three year period | 14 |
|
| 9 | [noun] [prep] a three year period | 14 |
|
