| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period [prep] time | 120 |
|
| 2 | over a [adj] period [prep] time | 113 |
|
| 3 | over a long period [prep] time | 77 |
|
| 4 | over a long period [prep] time | 71 |
|
| 5 | over a short period [prep] time | 8 |
|
| 6 | over a considerable period [prep] time | 7 |
|
| 7 | over a prolonged period [prep] time | 7 |
|
| 8 | over a considerable period [prep] time | 7 |
|
| 9 | over a [adj -er] period [prep] time | 7 |
|
| 10 | over a short period [prep] time | 7 |
|
| 11 | over a prolonged period [prep] time | 7 |
|
| 12 | over a longer period [prep] time | 6 |
|
| 13 | over a given period [prep] time | 5 |
|
| 14 | over a given period [prep] time | 5 |
|
| 15 | [noun] over a period [prep] time | 75 |
|
| 16 | [noun sg] over a period [prep] time | 48 |
|
| 17 | [noun pl] over a period [prep] time | 23 |
|
| 18 | [verb] over a period [prep] time | 22 |
|
| 19 | [adv] over a period [prep] time | 22 |
|
| 20 | [vb pp] over a period [prep] time | 21 |
|
| 21 | [conj] over a period [prep] time | 14 |
|
| 22 | [adv prt] over a period [prep] time | 12 |
|
| 23 | [coord] over a period [prep] time | 11 |
|
| 24 | [adv] over a period [prep] time | 9 |
|
| 25 | and over a period [prep] time | 7 |
|
| 26 | [adj] over a period [prep] time | 7 |
|
| 27 | and over a period [prep] time | 7 |
|
| 28 | up over a period [prep] time | 5 |
|
| 29 | [pron] over a period [prep] time | 5 |
|
| 30 | up over a period [prep] time | 5 |
|
