| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [adj] years | 9855 |
|
| 2 | period [prep] [adj] [noun] | 2211 |
|
| 3 | period [prep] [adj] [noun pl] | 914 |
|
| 4 | period [prep] [adj] year | 390 |
|
| 5 | period [prep] [adj] years | 357 |
|
