| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a two year period | 11 |
|
| 2 | over a two year period | 11 |
|
| 3 | over a two year [noun] | 11 |
|
| 4 | over a two year [noun] | 11 |
|
| 5 | over a two year [noun sg] | 11 |
|
