| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a [adj] period of | 57 |
|
| 2 | [adv] [prep] a [adj] period of | 46 |
|
| 3 | apart [prep] a [adj] [noun] of | 31 |
|
| 4 | apart [prep] a [adj] [noun sg] of | 24 |
|
| 5 | apart [prep] a [adj] period [prep] | 10 |
|
| 6 | apart [prep] [art] [adj] period of | 5 |
|
| 7 | apart [prep] [art] [adj] period of | 5 |
|
| 8 | apart [prep] a [adj] period of | 5 |
|
| 9 | apart [prep] a [adj] period of | 5 |
|
| 10 | apart [prep] a [adj] period of | 5 |
|
