| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] when [noun] [noun sg] | 38 |
|
| 2 | a [noun sg] when [noun] [noun sg] | 38 |
|
| 3 | a period when [noun] [noun] | 9 |
|
| 4 | [art] period when [noun] [noun sg] | 8 |
|
| 5 | [art] period when [noun] [noun sg] | 8 |
|
| 6 | a period [adv] [noun] [noun sg] | 6 |
|
| 7 | a period when [noun] [noun sg] | 6 |
|
| 8 | a period when [noun] [noun sg] | 6 |
|
