| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period | 1796 |
|
| 2 | [prep] a [adj] period | 1796 |
|
| 3 | for a [adj] period | 653 |
|
| 4 | for a [adj] period | 653 |
|
| 5 | over a [adj] period | 519 |
|
| 6 | over a [adj] period | 519 |
|
| 7 | [verb] a [adj] period | 247 |
|
| 8 | [adv] a [adj] period | 138 |
|
| 9 | after a [adj] period | 121 |
|
| 10 | after a [adj] period | 121 |
|
| 11 | [be] a [adj] period | 105 |
|
| 12 | be a [adj] period | 105 |
|
| 13 | in a [adj] period | 98 |
|
| 14 | in a [adj] period | 98 |
|
| 15 | within a [adj] period | 94 |
|
| 16 | within a [adj] period | 94 |
|
| 17 | [conj] a [adj] period | 77 |
|
| 18 | [adv prt] a [adj] period | 76 |
|
| 19 | over a [adj] period | 72 |
|
| 20 | over a [adj] period | 72 |
|
| 21 | of a [adj] period | 65 |
|
| 22 | of a [adj] period | 65 |
|
| 23 | during a [adj] period | 61 |
|
| 24 | during a [adj] period | 61 |
|
| 25 | [vb past] a [adj] period | 60 |
|
| 26 | [adv] a [adj] period | 58 |
|
| 27 | [v-ing] a [adj] period | 44 |
|
| 28 | [was/were] a [adj] period | 37 |
|
| 29 | was a [adj] period | 35 |
|
| 30 | [subord] a [adj] period | 34 |
|
