| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [adj] period [prep] [adj] years | 45 |
|
| 2 | [art] [adj] period [prep] [adj] years | 45 |
|
| 3 | a [adj] period [prep] [adj] years | 39 |
|
| 4 | a [adj] period [prep] [adj] years | 22 |
|
| 5 | an [adj] period [prep] [adj] years | 17 |
|
| 6 | the [adj] period [prep] [adj] years | 6 |
|
| 7 | the [adj] period [prep] [adj] years | 6 |
|
| 8 | [adj] [noun] period [prep] [adj] years | 6 |
|
| 9 | [adj] [noun sg] period [prep] [adj] years | 6 |
|
| 10 | [adj] period [prep] [adj] years [conj] | 6 |
|
| 11 | [adj] period [prep] [adj] years [prep] | 6 |
|
| 12 | [adj] period [prep] [adj] years [prep] | 6 |
|
| 13 | [adj] period [prep] [adj] years be | 5 |
|
| 14 | [adj] period [prep] [adj] years [be] | 5 |
|
