| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period of [noun sg] | 75 |
|
| 2 | [noun sg] over a period of [noun sg] | 48 |
|
| 3 | [noun pl] over a period of [noun sg] | 23 |
|
| 4 | [verb] over a period of [noun sg] | 23 |
|
| 5 | [adv] over a period of [noun sg] | 22 |
|
| 6 | [vb pp] over a period of [noun sg] | 21 |
|
| 7 | [conj] over a period of [noun sg] | 15 |
|
| 8 | [coord] over a period of [noun sg] | 12 |
|
| 9 | [adv prt] over a period of [noun sg] | 12 |
|
| 10 | [adv] over a period of [noun sg] | 9 |
|
| 11 | and over a period of [noun sg] | 8 |
|
| 12 | and over a period of [noun sg] | 8 |
|
| 13 | [adj] over a period of [noun sg] | 7 |
|
| 14 | [pron] over a period of [noun sg] | 5 |
|
| 15 | up over a period of [noun sg] | 5 |
|
| 16 | up over a period of [noun sg] | 5 |
|
| 17 | over a [adj] period of [noun sg] | 121 |
|
| 18 | over a [adj] period of [noun sg] | 114 |
|
| 19 | over a long period of [noun sg] | 78 |
|
| 20 | over a long period of [noun sg] | 72 |
|
| 21 | over a short period of [noun sg] | 8 |
|
| 22 | over a considerable period of [noun sg] | 7 |
|
| 23 | over a short period of [noun sg] | 7 |
|
| 24 | over a prolonged period of [noun sg] | 7 |
|
| 25 | over a prolonged period of [noun sg] | 7 |
|
| 26 | over a considerable period of [noun sg] | 7 |
|
| 27 | over a [adj -er] period of [noun sg] | 7 |
|
| 28 | over a longer period of [noun sg] | 6 |
|
| 29 | over a given period of [noun sg] | 5 |
|
| 30 | over a given period of [noun sg] | 5 |
|
