| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a period of time | 31 |
|
| 2 | [adv prt] [prep] a period of time | 15 |
|
| 3 | up [prep] a period of [noun] | 9 |
|
| 4 | up [prep] [art] period of time | 5 |
|
| 5 | up [prep] a period of time | 5 |
|
| 6 | up [prep] a period [prep] time | 5 |
|
| 7 | up [prep] a period of time | 5 |
|
| 8 | up [prep] a period of time | 5 |
|
| 9 | up [prep] a [noun] of time | 5 |
|
| 10 | up [prep] a [noun sg] of time | 5 |
|
| 11 | up [prep] a period [prep] time | 5 |
|
| 12 | up [prep] a period of time | 5 |
|
| 13 | up [prep] [art] period of time | 5 |
|
| 14 | up [prep] a period of time | 5 |
|
