| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] [prep] teachers ' | 12 |
|
| 2 | a [noun sg] of teachers ' | 7 |
|
| 3 | a [noun sg] [prep] teachers ' | 7 |
|
| 4 | a [noun sg] of teachers ' | 7 |
|
| 5 | an [noun sg] [prep] teachers ' | 5 |
|
