| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] over a period of | 25 |
|
| 2 | [conj] over a period [prep] | 25 |
|
| 3 | [conj] over a period [prep] | 25 |
|
| 4 | [conj] over a period of | 25 |
|
| 5 | [noun] [conj] over a period | 8 |
|
| 6 | [noun sg] [conj] over a period | 7 |
|
| 7 | [conj] [noun] over a period | 10 |
|
| 8 | [conj] [noun sg] over a period | 5 |
|
| 9 | [conj] [adv] over a period | 5 |
|
| 10 | [conj] over a [adj] period | 17 |
|
| 11 | [conj] over a [adj] period | 15 |
|
| 12 | [conj] over a long period | 11 |
|
| 13 | [conj] over a long period | 9 |
|
