| Keyword | CPC | PCC | Volume | Length string | Score |
|---|---|---|---|---|---|
| number of airports usa | 0.29 | 0.6 | 6962 | 22 | 39 |
| total number of airports in usa | 1.77 | 0.5 | 572 | 31 | 89 |
| number of class b airports in usa | 1.32 | 0.6 | 1657 | 33 | 35 |
| number of international airports in usa | 1.38 | 0.4 | 6614 | 39 | 6 |
| total number of international airports in usa | 0.36 | 0.3 | 1360 | 45 | 6 |
