| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| normal oxygen level in breathing air | 0.53 | 0.2 | 6659 | 71 |
| average oxygen level in air | 0.04 | 0.7 | 1457 | 91 |
| level of oxygen in air | 1.72 | 0.5 | 2406 | 11 |
| normal level of oxygen in lungs | 1.25 | 0.5 | 865 | 69 |
| what is the oxygen level in air | 1.98 | 0.5 | 4376 | 21 |
| normal oxygen percentage in air | 1.41 | 0.6 | 5788 | 95 |
| standard oxygen level in air | 1.07 | 0.3 | 2631 | 51 |
| oxygen level normal but hard time breathing | 1.89 | 1 | 2707 | 30 |
| normal oxygen content in air | 1.91 | 0.4 | 1522 | 70 |
| oxygen level normal but short of breath | 0.3 | 0.6 | 6928 | 11 |
| breathing oxygen level chart | 0.51 | 1 | 5472 | 25 |
| normal level of oxygen | 0.49 | 0.3 | 8734 | 73 |
| minimum oxygen percentage for breathing | 1.56 | 0.7 | 9603 | 82 |
| breathless but normal oxygen levels | 1.15 | 0.8 | 1344 | 9 |
| how much oxygen are we breathing | 1.55 | 0.6 | 7797 | 7 |
| minimum oxygen concentration for breathing | 0.52 | 0.3 | 777 | 52 |
