| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period [prep] weeks | 9 |
|
| 2 | [noun pl] over a period [prep] weeks | 5 |
|
| 3 | [adv] over a period [prep] weeks | 5 |
|
| 4 | over a period [prep] [adj] weeks | 17 |
|
| 5 | over a period [prep] [num] weeks | 13 |
|
| 6 | over a period [prep] three weeks | 6 |
|
| 7 | over a period [prep] three weeks | 6 |
|
| 8 | over a period [prep] weeks [conj] | 11 |
|
| 9 | over a period [prep] weeks [coord] | 10 |
|
| 10 | over a period [prep] weeks and | 6 |
|
| 11 | over a period [prep] weeks and | 6 |
|
