| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| worst helicopter crashes vietnam | 0.34 | 0.3 | 3507 | 100 | 32 |
| worst | 1.24 | 1 | 3947 | 86 | 5 |
| helicopter | 0.27 | 0.4 | 1054 | 23 | 10 |
| crashes | 0.32 | 0.8 | 8387 | 23 | 7 |
| vietnam | 0.23 | 0.2 | 2850 | 57 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| worst helicopter crashes vietnam | 0.26 | 0.2 | 6810 | 75 |
| vietnam helicopter crashes by date | 0.14 | 1 | 2560 | 16 |
| helicopter pilots killed in vietnam | 1.74 | 0.5 | 2745 | 27 |
| how many helicopters crashed in vietnam | 1.94 | 0.5 | 4747 | 10 |
| attack helicopters in vietnam | 1.95 | 1 | 3110 | 1 |
| list of helicopter pilots killed in vietnam | 1.28 | 0.5 | 2341 | 13 |
| helicopters lost in vietnam | 1.01 | 0.1 | 4497 | 71 |
| vietnam war attack helicopters | 0.23 | 0.4 | 795 | 86 |
| helicopter losses in vietnam war | 0.64 | 0.2 | 4034 | 68 |
| helicopters lost in vietnam war | 0.56 | 0.8 | 844 | 51 |
| chinook helicopter crash in vietnam | 0.22 | 0.7 | 6618 | 41 |
| vietnam era attack helicopter | 1.05 | 0.2 | 2963 | 85 |
| helicopter assault in vietnam | 0.7 | 0.7 | 7408 | 33 |
| helicopter war in vietnam | 0.59 | 0.4 | 5604 | 48 |
| helicopters shot down in vietnam | 1.94 | 0.1 | 3025 | 73 |
| last helicopter out of vietnam | 0.7 | 0.1 | 7908 | 49 |
| vietnam army helicopter pilot deaths | 0.28 | 0.8 | 5913 | 83 |
| number of helicopter pilots killed in vietnam | 0.55 | 0.1 | 9091 | 50 |
| army helicopters shot down in vietnam | 0.8 | 0.6 | 5770 | 54 |
| number of helicopters lost in vietnam | 0.81 | 0.5 | 1521 | 13 |
