| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period [prep] | 183 |
|
| 2 | over a [adj] period [prep] | 173 |
|
| 3 | over a long period [prep] | 93 |
|
| 4 | over a long period [prep] | 85 |
|
| 5 | over a [adj -er] period [prep] | 10 |
|
| 6 | over a prolonged period [prep] | 9 |
|
| 7 | over a prolonged period [prep] | 9 |
|
| 8 | over a short period [prep] | 9 |
|
| 9 | over a short period [prep] | 8 |
|
| 10 | over a longer period [prep] | 8 |
|
| 11 | over a considerable period [prep] | 7 |
|
| 12 | over a considerable period [prep] | 7 |
|
| 13 | over a given period [prep] | 6 |
|
| 14 | over a given period [prep] | 6 |
|
| 15 | over a [noun sg] period [prep] | 6 |
|
| 16 | over a [noun] period [prep] | 6 |
|
| 17 | [noun] over a period [prep] | 295 |
|
| 18 | [noun sg] over a period [prep] | 168 |
|
| 19 | [noun pl] over a period [prep] | 105 |
|
| 20 | [verb] over a period [prep] | 76 |
|
| 21 | [vb pp] over a period [prep] | 71 |
|
| 22 | [adv] over a period [prep] | 60 |
|
| 23 | [adv] over a period [prep] | 34 |
|
| 24 | [adj] over a period [prep] | 28 |
|
| 25 | [conj] over a period [prep] | 25 |
|
| 26 | [adv prt] over a period [prep] | 25 |
|
| 27 | [adj] over a period [prep] | 19 |
|
| 28 | [coord] over a period [prep] | 18 |
|
| 29 | and over a period [prep] | 12 |
|
| 30 | and over a period [prep] | 12 |
|
