| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 773 |
|
| 2 | [prep] a [adj] period [prep] | 773 |
|
| 3 | for a [adj] period [prep] | 272 |
|
| 4 | for a [adj] period [prep] | 272 |
|
| 5 | [verb] a [adj] period [prep] | 180 |
|
| 6 | over a [adj] period [prep] | 176 |
|
| 7 | over a [adj] period [prep] | 176 |
|
| 8 | after a [adj] period [prep] | 80 |
|
| 9 | after a [adj] period [prep] | 80 |
|
| 10 | be a [adj] period [prep] | 63 |
|
| 11 | [be] a [adj] period [prep] | 63 |
|
| 12 | [adv] a [adj] period [prep] | 53 |
|
| 13 | [conj] a [adj] period [prep] | 45 |
|
| 14 | [vb past] a [adj] period [prep] | 43 |
|
| 15 | of a [adj] period [prep] | 41 |
|
| 16 | of a [adj] period [prep] | 41 |
|
| 17 | within a [adj] period [prep] | 40 |
|
| 18 | within a [adj] period [prep] | 40 |
|
| 19 | [v-ing] a [adj] period [prep] | 32 |
|
| 20 | in a [adj] period [prep] | 30 |
|
| 21 | in a [adj] period [prep] | 30 |
|
| 22 | [adv] a [adj] period [prep] | 27 |
|
| 23 | during a [adj] period [prep] | 25 |
|
| 24 | during a [adj] period [prep] | 25 |
|
| 25 | [vb base] a [adj] period [prep] | 23 |
|
| 26 | [adv prt] a [adj] period [prep] | 23 |
|
| 27 | [to-vb] a [adj] period [prep] | 23 |
|
| 28 | have a [adj] period [prep] | 21 |
|
| 29 | [vb pp] a [adj] period [prep] | 21 |
|
| 30 | [vb -s] a [adj] period [prep] | 20 |
|
