| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period of | 544 |
|
| 2 | [prep] a [adj] period of | 544 |
|
| 3 | for a [adj] period of | 177 |
|
| 4 | for a [adj] period of | 177 |
|
| 5 | over a [adj] period of | 137 |
|
| 6 | over a [adj] period of | 137 |
|
| 7 | [verb] a [adj] period of | 135 |
|
| 8 | after a [adj] period of | 64 |
|
| 9 | after a [adj] period of | 64 |
|
| 10 | [adv] a [adj] period of | 42 |
|
| 11 | [conj] a [adj] period of | 37 |
|
| 12 | [vb past] a [adj] period of | 36 |
|
| 13 | [be] a [adj] period of | 34 |
|
| 14 | be a [adj] period of | 34 |
|
| 15 | of a [adj] period of | 27 |
|
| 16 | of a [adj] period of | 27 |
|
| 17 | in a [adj] period of | 26 |
|
| 18 | in a [adj] period of | 26 |
|
| 19 | within a [adj] period of | 24 |
|
| 20 | within a [adj] period of | 24 |
|
| 21 | [v-ing] a [adj] period of | 21 |
|
| 22 | [adv] a [adj] period of | 20 |
|
| 23 | [adv prt] a [adj] period of | 19 |
|
| 24 | have a [adj] period of | 17 |
|
| 25 | [to-vb] a [adj] period of | 17 |
|
| 26 | to a [adj] period of | 16 |
|
| 27 | over a [adj] period of | 16 |
|
| 28 | over a [adj] period of | 16 |
|
| 29 | to a [adj] period of | 16 |
|
| 30 | [vb base] a [adj] period of | 16 |
|
