| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period of around [adj] [noun] | 8 |
|
| 2 | period of around [adj] [noun pl] | 8 |
|
| 3 | period of around [adj] days | 6 |
|
| 4 | period of around [adj] day | 6 |
|
