| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what are the respiratory centers | 1.89 | 0.8 | 9372 | 60 | 32 |
| what | 1.28 | 0.4 | 669 | 100 | 4 |
| are | 0.04 | 1 | 6048 | 76 | 3 |
| the | 0.13 | 0.4 | 1928 | 7 | 3 |
| respiratory | 0.96 | 0.9 | 369 | 24 | 11 |
| centers | 0.31 | 0.1 | 4309 | 21 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what are the respiratory centers | 0.63 | 1 | 3310 | 62 |
