| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over such a period | 5 |
|
| 2 | over [det] a period | 5 |
|
| 3 | over [adj] a period | 5 |
|
| 4 | over such a period | 5 |
|
| 5 | [noun] over a period | 311 |
|
| 6 | [noun sg] over a period | 180 |
|
| 7 | [noun pl] over a period | 109 |
|
| 8 | [verb] over a period | 83 |
|
| 9 | [vb pp] over a period | 78 |
|
| 10 | [adv] over a period | 69 |
|
| 11 | [adv] over a period | 39 |
|
| 12 | [conj] over a period | 29 |
|
| 13 | [adv prt] over a period | 29 |
|
| 14 | [adj] over a period | 29 |
|
| 15 | [coord] over a period | 20 |
|
| 16 | [adj] over a period | 20 |
|
| 17 | and over a period | 14 |
|
| 18 | and over a period | 14 |
|
| 19 | [noun prp] over a period | 12 |
|
| 20 | place over a period | 10 |
|
| 21 | place over a period | 9 |
|
| 22 | [n mass] over a period | 9 |
|
| 23 | up over a period | 9 |
|
| 24 | up over a period | 9 |
|
| 25 | [pron] over a period | 9 |
|
| 26 | gradually over a period | 7 |
|
| 27 | gradually over a period | 7 |
|
| 28 | out over a period | 6 |
|
| 29 | [that] over a period | 6 |
|
| 30 | that over a period | 6 |
|
