| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 736 |
|
| 2 | [prep] a [adj] period [prep] | 736 |
|
| 3 | for a [adj] period [prep] | 257 |
|
| 4 | for a [adj] period [prep] | 257 |
|
| 5 | over a [adj] period [prep] | 166 |
|
| 6 | over a [adj] period [prep] | 166 |
|
| 7 | [verb] a [adj] period [prep] | 159 |
|
| 8 | after a [adj] period [prep] | 77 |
|
| 9 | after a [adj] period [prep] | 77 |
|
| 10 | [be] a [adj] period [prep] | 58 |
|
| 11 | be a [adj] period [prep] | 58 |
|
| 12 | [adv] a [adj] period [prep] | 53 |
|
| 13 | within a [adj] period [prep] | 40 |
|
| 14 | [conj] a [adj] period [prep] | 40 |
|
| 15 | within a [adj] period [prep] | 40 |
|
| 16 | [vb past] a [adj] period [prep] | 39 |
|
| 17 | of a [adj] period [prep] | 38 |
|
| 18 | of a [adj] period [prep] | 38 |
|
| 19 | [v-ing] a [adj] period [prep] | 29 |
|
| 20 | in a [adj] period [prep] | 29 |
|
| 21 | in a [adj] period [prep] | 29 |
|
| 22 | [adv] a [adj] period [prep] | 27 |
|
| 23 | during a [adj] period [prep] | 24 |
|
| 24 | during a [adj] period [prep] | 24 |
|
| 25 | [adv prt] a [adj] period [prep] | 23 |
|
| 26 | [vb base] a [adj] period [prep] | 21 |
|
| 27 | [vb -s] a [adj] period [prep] | 20 |
|
| 28 | [vb pp] a [adj] period [prep] | 19 |
|
| 29 | over a [adj] period [prep] | 19 |
|
| 30 | have a [adj] period [prep] | 19 |
|
