| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| percentage of oxygen in air by volume | 0.36 | 0.9 | 8190 | 70 | 37 |
| percentage | 1.46 | 0.9 | 730 | 30 | 10 |
| of | 1.51 | 0.7 | 5902 | 65 | 2 |
| oxygen | 1.04 | 0.1 | 3097 | 47 | 6 |
| in | 0.58 | 0.7 | 458 | 72 | 2 |
| air | 0.39 | 0.1 | 9592 | 45 | 3 |
| by | 1.04 | 0.3 | 630 | 22 | 2 |
| volume | 1.03 | 1 | 4188 | 100 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| percentage of oxygen in air by volume | 0.81 | 0.5 | 7534 | 94 |
