Final answer:
The Air Force Commendation Medal is not as common as other Air Force achievement awards.
Step-by-step explanation:
There are several commonly awarded Air Force achievement medals, but one that is not as common is the Air Force Commendation Medal. This award is typically given for acts of heroism or meritorious service, but it is not as frequently awarded as the Air Force Achievement Medal or the Air Force Meritorious Service Medal.