| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | up [prep] a [noun] of | 970 |
|
| 2 | up [prep] a [noun sg] of | 919 |
|
| 3 | [adv] [prep] a period of | 129 |
|
| 4 | [adv prt] [prep] a period of | 41 |
|
| 5 | up [prep] [art] period of | 15 |
|
| 6 | up [prep] [art] period of | 15 |
|
| 7 | up [prep] a period of | 14 |
|
| 8 | up [prep] a period of | 14 |
|
| 9 | up [prep] a period of | 14 |
|
| 10 | up [prep] a period of | 14 |
|
| 11 | up [prep] a period [prep] | 14 |
|
| 12 | up [prep] a period [prep] | 14 |
|
