| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a [adj] period [prep] | 210 |
|
| 2 | [noun sg] [prep] a [adj] period of | 164 |
|
| 3 | [noun sg] over a [adj] period [prep] | 67 |
|
| 4 | [noun sg] for a [adj] period [prep] | 67 |
|
| 5 | [noun sg] [prep] a long period [prep] | 67 |
|
| 6 | [noun sg] [prep] a long period [prep] | 58 |
|
| 7 | [noun sg] of a [adj] period [prep] | 32 |
|
| 8 | [noun sg] [prep] a [adj] period in | 18 |
|
| 9 | [noun sg] [prep] a short period [prep] | 15 |
|
| 10 | [noun sg] [prep] a short period [prep] | 14 |
|
| 11 | [noun sg] [prep] a [adj -er] period [prep] | 13 |
|
| 12 | [noun sg] [prep] a fixed period [prep] | 12 |
|
| 13 | [noun sg] [prep] a fixed period [prep] | 12 |
|
| 14 | [noun sg] after a [adj] period [prep] | 11 |
|
| 15 | [noun sg] [prep] a specified period [prep] | 10 |
|
| 16 | [noun sg] [prep] a specified period [prep] | 10 |
|
| 17 | [noun sg] within a [adj] period [prep] | 10 |
|
| 18 | [noun sg] [prep] a continuous period [prep] | 9 |
|
| 19 | [noun sg] during a [adj] period [prep] | 9 |
|
| 20 | end [prep] a [adj] period [prep] | 9 |
|
| 21 | [noun sg] [prep] a continuous period [prep] | 9 |
|
| 22 | [noun sg] [prep] a longer period [prep] | 9 |
|
| 23 | [noun sg] [prep] a particular period [prep] | 9 |
|
| 24 | [noun sg] [prep] a particular period [prep] | 9 |
|
| 25 | [noun sg] [prep] a prolonged period [prep] | 8 |
|
| 26 | [noun sg] [prep] a prolonged period [prep] | 8 |
|
| 27 | [noun sg] at a [adj] period [prep] | 8 |
|
| 28 | [noun sg] [prep] a reasonable period [prep] | 6 |
|
| 29 | [noun sg] [prep] a reasonable period [prep] | 6 |
|
| 30 | [noun sg] [prep] a certain period [prep] | 6 |
|
