| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [adv] over a period | 13 |
|
| 2 | [be] [verb] [adv] over a period | 13 |
|
| 3 | [be] [verb] [adv] over a period | 7 |
|
| 4 | be [verb] [adv] over a period | 7 |
|
| 5 | [noun] [verb] [adv] over a period | 5 |
|
| 6 | [verb] [verb] [adv] over a period | 5 |
|
| 7 | [verb] [adv] [adv] over a period | 6 |
|
| 8 | [verb] [verb] [adv] over a period | 5 |
|
| 9 | [verb] [adv] [adv] over a period | 6 |
|
| 10 | [verb] [adv] over a [adj] period | 25 |
|
| 11 | [verb] [adv] over a [adj] period | 23 |
|
| 12 | [verb] [adv] over a long period | 11 |
|
| 13 | [verb] [adv] over a long period | 9 |
|
| 14 | [verb] [adv] over a period [prep] | 31 |
|
| 15 | [verb] [adv] over a period of | 31 |
|
| 16 | [verb] [adv] over a period [prep] | 31 |
|
| 17 | [verb] [adv] over a period of | 31 |
|
