| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to a period [prep] | 24 |
|
| 2 | [noun] to a period [prep] | 14 |
|
| 3 | [noun sg] to a period [prep] | 13 |
|
| 4 | [vb pp] to a period [prep] | 8 |
|
| 5 | [vb past] to a period [prep] | 6 |
|
| 6 | refer to a period [prep] | 5 |
|
| 7 | to be a period [prep] | 15 |
|
| 8 | to be a period [prep] | 15 |
|
| 9 | to [be] a period [prep] | 15 |
|
| 10 | to [be] a period [prep] | 15 |
|
| 11 | to a [adj] period [prep] | 18 |
|
| 12 | to a [adj] period [prep] | 17 |
|
| 13 | to a long period [prep] | 5 |
|
| 14 | to a long period [prep] | 5 |
|
| 15 | to a period [prep] [noun] | 19 |
|
| 16 | to a period [prep] [adj] | 19 |
|
| 17 | to a period [prep] [noun sg] | 17 |
|
| 18 | to a period [prep] [num] | 10 |
|
| 19 | to a period [prep] [adj] | 7 |
|
