| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a period | 178 |
|
| 2 | [adv] [prep] a period | 121 |
|
| 3 | [adv] over a period | 69 |
|
| 4 | [adv prt] [prep] a period | 54 |
|
| 5 | [adv] for a period | 37 |
|
| 6 | [adv] after a period | 20 |
|
| 7 | up [prep] a period | 17 |
|
| 8 | up [prep] a period | 17 |
|
| 9 | [adv] in a period | 15 |
|
| 10 | [adv] during a period | 9 |
|
| 11 | out [prep] a period | 8 |
|
| 12 | out [prep] a period | 8 |
|
| 13 | only [prep] a period | 7 |
|
| 14 | gradually [prep] a period | 7 |
|
| 15 | back [prep] a period | 7 |
|
| 16 | gradually [prep] a period | 7 |
|
| 17 | back [prep] a period | 7 |
|
| 18 | only [prep] a period | 7 |
|
| 19 | [adv] to a period | 7 |
|
| 20 | on [prep] a period | 6 |
|
| 21 | on [prep] a period | 6 |
|
| 22 | off [prep] a period | 5 |
|
| 23 | even [prep] a period | 5 |
|
| 24 | especially [prep] a period | 5 |
|
| 25 | especially [prep] a period | 5 |
|
| 26 | in [prep] a period | 5 |
|
| 27 | even [prep] a period | 5 |
|
| 28 | off [prep] a period | 5 |
|
| 29 | in [prep] a period | 5 |
|
