| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what was the iron lung used for | 0.02 | 0.7 | 1569 | 77 |
| what was the iron lung used to treat | 0.93 | 0.8 | 8361 | 61 |
| what was the iron lung and how did it work | 1.05 | 1 | 3651 | 63 |
| iron lung movie | 1.32 | 0.2 | 1946 | 39 |
| iron lung game | 0.4 | 0.4 | 5284 | 25 |
| what is an iron lung | 0.92 | 0.3 | 3099 | 68 |
| iron lung man | 0.69 | 0.1 | 6776 | 18 |
| how does an iron lung work | 0.43 | 0.3 | 1968 | 86 |
| iron lung movie release date | 1.79 | 0.4 | 6947 | 96 |
| iron lung used for what disease | 1.7 | 0.6 | 9369 | 98 |
| what did the iron lung do | 0.21 | 0.6 | 1388 | 91 |
| are iron lungs used today | 1.2 | 0.2 | 2636 | 57 |
| why do people use iron lungs | 0.95 | 0.3 | 9536 | 93 |
| what was the iron lung for | 1.64 | 0.2 | 7155 | 38 |
| is the iron lung still used | 1.63 | 0.9 | 3941 | 21 |
| is the iron lung still used today | 1.18 | 0.8 | 116 | 53 |
| what is an iron lung used for | 1.99 | 0.6 | 319 | 69 |
| why are iron lung machines still used | 1.31 | 0.1 | 3199 | 48 |
| iron lung used for | 0.63 | 0.8 | 2411 | 57 |
