| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adv] long period | 20 |
|
| 2 | [noun] [prep] a [adv] long period | 20 |
|
| 3 | [noun] [prep] a much long [noun] | 16 |
|
| 4 | [noun] [prep] a much [adj] period | 11 |
|
| 5 | [noun] [prep] [art] much long period | 7 |
|
| 6 | [noun] [prep] a much long period | 7 |
|
