| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a period [prep] [noun sg] | 51 |
|
| 2 | [adv] [prep] a period of [noun sg] | 51 |
|
| 3 | [adv] [prep] a period of [noun sg] | 51 |
|
| 4 | [adv] [prep] a period [prep] time | 31 |
|
| 5 | [adv] [prep] a period [prep] [noun sg] | 30 |
|
| 6 | [adv] over a period [prep] [noun sg] | 22 |
|
| 7 | [adv prt] [prep] a period [prep] [noun sg] | 20 |
|
| 8 | [adv] after a period [prep] [noun sg] | 9 |
|
| 9 | up [prep] a period [prep] [noun sg] | 7 |
|
| 10 | up [prep] a period [prep] [noun sg] | 7 |
|
| 11 | [adv] for a period [prep] [noun sg] | 5 |
|
