| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] period [prep] [adj] years [pron] | 11 |
|
| 2 | a period [prep] [adj] years [pron] | 11 |
|
| 3 | a period [prep] [adj] years [pron] | 11 |
|
| 4 | [art] period [prep] [adj] years [pron] | 11 |
|
| 5 | period [prep] [adj] years [prep] [pron] | 7 |
|
| 6 | period [prep] [adj] years [prep] [pron] | 7 |
|
| 7 | period [prep] [adj] years [pron] [verb] | 9 |
|
| 8 | period [prep] [adj] years [pron] [vb past] | 6 |
|
