| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period [prep] a few [noun pl] | 18 |
|
| 2 | period [prep] [art] few [noun pl] | 18 |
|
| 3 | period of [art] few [noun pl] | 17 |
|
| 4 | period of [art] few [noun pl] | 17 |
|
| 5 | period [prep] [art] few years | 6 |
|
