| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be of [noun sg] a | 99 |
|
| 2 | be of [noun] a | 99 |
|
| 3 | be of necessity [art] | 7 |
|
| 4 | be of necessity [art] | 7 |
|
| 5 | be of necessity a | 7 |
|
| 6 | [be] of necessity a | 6 |
|
| 7 | be of necessity a | 6 |
|
| 8 | be [prep] necessity a | 6 |
|
