| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | while he [was/were] on [noun] | 13 |
|
| 2 | while he [was/were] on [noun] | 13 |
|
| 3 | while he [was/were] on [noun sg] | 13 |
|
| 4 | while he was on [noun] | 13 |
|
