Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
when were airplanes used in ww1 | 1.86 | 0.9 | 449 | 89 |
when were planes used in ww1 | 1.57 | 0.5 | 2733 | 32 |
how were airplanes used in ww1 | 0.38 | 0.5 | 1832 | 61 |
what were airplanes used for in ww1 | 0.91 | 0.3 | 4989 | 29 |
when were airplanes first used in ww1 | 1.48 | 0.1 | 9812 | 16 |
why were airplanes used in ww1 | 0.75 | 1 | 6863 | 26 |
were planes used in ww1 | 0.78 | 0.2 | 402 | 24 |
what were planes used for in ww1 | 1.85 | 0.6 | 2764 | 94 |
when were planes first used in ww1 | 0.51 | 0.6 | 5014 | 28 |
how many planes were used in ww1 | 1.38 | 0.7 | 4807 | 47 |
in what ways were planes used in ww1 | 0.51 | 0.1 | 2961 | 28 |