| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| helicopters ww1 | 1.89 | 0.9 | 1034 | 25 | 15 |
| helicopters | 1.07 | 0.5 | 6651 | 44 | 11 |
| ww1 | 1.85 | 1 | 8562 | 44 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| helicopters ww1 | 0.91 | 0.1 | 2502 | 77 |
| helicopters ww2 | 0.66 | 0.5 | 5950 | 57 |
| helicopters wwii | 1.93 | 0.9 | 5956 | 24 |
| were helicopters used in ww1 | 0.74 | 0.7 | 4918 | 58 |
| were there helicopters in ww1 | 1.15 | 0.3 | 9704 | 17 |
| did they have helicopters in ww1 | 1.25 | 1 | 5197 | 93 |
| where there helicopters in ww1 | 0.98 | 0.6 | 9389 | 78 |
| did they use helicopters in ww1 | 1.53 | 0.3 | 6019 | 44 |
| did ww1 have helicopters | 0.03 | 0.6 | 1546 | 94 |
| was there helicopters in ww1 | 0.69 | 0.5 | 2059 | 70 |
| helicopter ww2 role | 1.58 | 0.7 | 4945 | 18 |
| helicopter ww2 facts | 0.27 | 0.9 | 1134 | 51 |
| helicopter ww2 types | 1.32 | 0.9 | 3060 | 5 |
| helicopter ww2 design | 1.09 | 0.6 | 8695 | 81 |
