| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [prep] | 168934 |
|
| 2 | [prep] a [noun sg] [prep] | 163355 |
|
| 3 | [prep] [art] time [prep] | 5372 |
|
| 4 | [prep] a time [prep] | 808 |
|
| 5 | [prep] a time [prep] | 808 |
|
