| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long period of [noun] | 127 |
|
| 2 | [prep] a long period of [noun sg] | 123 |
|
| 3 | [prep] a long period of time | 98 |
|
| 4 | [prep] a long period of time | 98 |
|
| 5 | [prep] a long period of [adj] | 17 |
|
| 6 | [prep] a long period of [adj] | 16 |
|
| 7 | [noun] [prep] a long period of | 70 |
|
| 8 | [noun sg] [prep] a long period of | 57 |
|
| 9 | [verb] [prep] a long period of | 34 |
|
| 10 | [vb pp] [prep] a long period of | 27 |
|
| 11 | [adv] [prep] a long period of | 15 |
|
| 12 | [adv] [prep] a long period of | 12 |
|
| 13 | [noun pl] [prep] a long period of | 11 |
|
| 14 | [prep] a [adv] long period of | 11 |
|
| 15 | [prep] a [adv] long period of | 11 |
|
