| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a billion [noun pl] [art] [noun sg] | 12 |
|
| 2 | a billion [noun pl] [art] [noun] | 12 |
|
| 3 | a billion [noun pl] [art] year | 7 |
|
| 4 | a billion [noun pl] [art] year | 7 |
|
