| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [noun] over a period of | 37 |
|
| 2 | [noun sg] [noun] over a period of | 31 |
|
| 3 | [noun] [noun pl] over a period of | 18 |
|
| 4 | [noun] [noun sg] over a period of | 16 |
|
| 5 | [noun prp] [noun] over a period of | 6 |
|
