| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| how is nox formed in combustion | 1.14 | 0.3 | 5856 | 97 | 31 |
| how | 1.18 | 0.8 | 5378 | 4 | 3 |
| is | 1.96 | 0.7 | 7300 | 27 | 2 |
| nox | 0.8 | 0.5 | 8572 | 29 | 3 |
| formed | 0.36 | 0.1 | 9500 | 90 | 6 |
| in | 0.88 | 1 | 5703 | 26 | 2 |
| combustion | 1.41 | 0.6 | 62 | 21 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how is nox formed in combustion | 0.96 | 0.3 | 7980 | 89 |
