| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period [prep] [noun] | 128 |
|
| 2 | [noun sg] over a period [prep] [noun] | 78 |
|
| 3 | [noun pl] over a period [prep] [noun] | 42 |
|
| 4 | [adv] over a period [prep] [noun] | 39 |
|
| 5 | [verb] over a period [prep] [noun] | 33 |
|
| 6 | [vb pp] over a period [prep] [noun] | 31 |
|
| 7 | [adv prt] over a period [prep] [noun] | 20 |
|
| 8 | [conj] over a period [prep] [noun] | 19 |
|
| 9 | [adv] over a period [prep] [noun] | 18 |
|
| 10 | [coord] over a period [prep] [noun] | 15 |
|
| 11 | [adj] over a period [prep] [noun] | 15 |
|
| 12 | [adj] over a period [prep] [noun] | 11 |
|
| 13 | and over a period [prep] [noun] | 9 |
|
| 14 | and over a period [prep] [noun] | 9 |
|
| 15 | up over a period [prep] [noun] | 7 |
|
| 16 | up over a period [prep] [noun] | 7 |
|
| 17 | place over a period [prep] [noun] | 6 |
|
| 18 | [pron] over a period [prep] [noun] | 6 |
|
| 19 | place over a period [prep] [noun] | 5 |
|
| 20 | over a [adj] period [prep] [noun] | 141 |
|
| 21 | over a [adj] period [prep] [noun] | 134 |
|
| 22 | over a long period [prep] [noun] | 84 |
|
| 23 | over a long period [prep] [noun] | 78 |
|
| 24 | over a short period [prep] [noun] | 8 |
|
| 25 | over a considerable period [prep] [noun] | 7 |
|
| 26 | over a prolonged period [prep] [noun] | 7 |
|
| 27 | over a short period [prep] [noun] | 7 |
|
| 28 | over a prolonged period [prep] [noun] | 7 |
|
| 29 | over a considerable period [prep] [noun] | 7 |
|
| 30 | over a [adj -er] period [prep] [noun] | 7 |
|
