| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a period [prep] [noun sg] | 144 |
|
| 2 | [verb] a period of [noun] | 139 |
|
| 3 | [v-ing] a period [prep] [noun] | 31 |
|
| 4 | [vb past] a period [prep] [noun] | 30 |
|
| 5 | [vb base] a period [prep] [noun] | 21 |
|
| 6 | follow a period [prep] [noun] | 20 |
|
| 7 | [to-vb] a period [prep] [noun] | 20 |
|
| 8 | [vb infin] a period [prep] [noun] | 18 |
|
| 9 | [vb pp] a period [prep] [noun] | 17 |
|
| 10 | [vb -s] a period [prep] [noun] | 16 |
|
| 11 | enter a period [prep] [noun] | 13 |
|
| 12 | following a period [prep] [noun] | 13 |
|
| 13 | [verb] a period [prep] time | 9 |
|
| 14 | [verb] a period [prep] time | 9 |
|
| 15 | [verb] a period in [noun] | 8 |
|
| 16 | spend a period [prep] [noun] | 8 |
|
| 17 | require a period [prep] [noun] | 7 |
|
| 18 | have a period [prep] [noun] | 7 |
|
| 19 | undergo a period [prep] [noun] | 6 |
|
| 20 | face a period [prep] [noun] | 6 |
|
| 21 | need a period [prep] [noun] | 6 |
|
| 22 | include a period [prep] [noun] | 5 |
|
| 23 | followed a period [prep] [noun] | 5 |
|
| 24 | [verb] a period [prep] [noun pl] | 5 |
|
| 25 | entering a period [prep] [noun] | 5 |
|
