| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| pure oxygen vs oxygen from a concentrator | 1.3 | 0.9 | 2825 | 53 | 41 |
| pure | 1.35 | 0.9 | 1297 | 3 | 4 |
| oxygen | 1.68 | 0.5 | 2352 | 7 | 6 |
| vs | 1.7 | 0.7 | 396 | 68 | 2 |
| oxygen | 1.61 | 0.5 | 2955 | 5 | 6 |
| from | 0.07 | 0.8 | 3712 | 47 | 4 |
| a | 1.25 | 0.6 | 4722 | 75 | 1 |
| concentrator | 1.91 | 0.1 | 6663 | 58 | 12 |
