| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [noun] over a period | 10 |
|
| 2 | and [noun] over a period | 7 |
|
| 3 | and [noun] over a period | 7 |
|
| 4 | [conj] [noun sg] over a period | 5 |
|
