| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] [prep] a long period | 44 |
|
| 2 | [prep] [noun] [prep] a long period | 36 |
|
| 3 | [prep] [noun sg] [prep] a long period | 31 |
|
| 4 | [prep] [noun] over a long period | 31 |
|
| 5 | [prep] [noun] over a long period | 31 |
|
| 6 | of [noun] [prep] a long period | 22 |
|
| 7 | [prep] [noun pl] [prep] a long period | 9 |
|
| 8 | [prep] [noun] [prep] a longer period | 8 |
|
| 9 | [prep] [noun] for a long period | 7 |
|
| 10 | [prep] [noun] for a long period | 7 |
|
| 11 | with [noun] [prep] a long period | 6 |
|
| 12 | in [noun] [prep] a long period | 5 |
|
| 13 | to [noun] [prep] a long period | 5 |
|
