| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] time | 337 |
|
| 2 | a long period [prep] [noun] | 179 |
|
| 3 | a long period [prep] [noun sg] | 172 |
|
| 4 | a long [noun sg] [prep] time | 128 |
|
| 5 | a long [noun] [prep] time | 128 |
|
| 6 | [art] long period [prep] time | 117 |
|
| 7 | [art] long period [prep] time | 117 |
|
| 8 | a long period [prep] time | 115 |
|
| 9 | a long period [prep] time | 115 |
|
| 10 | a long period [prep] time | 115 |
|
| 11 | a long period [prep] time | 115 |
|
