Who deploys (to combat) more? Army or Marines?

My dates of service are 9/2009 to 12/2013. I was a combat medic in the 101st Airborne. I deployed twice to Afghanistan. A year long one
and a 9 month one. When I went to Penn State to begin college in 2014, I joined the school veterans organization and noticed the most
strange thing. It was filled with mostly active duty marine veterans who served the same time as me, but most never did a combat deployment
. Only two or three of them did a short single 6 month afghanistan deployment. Everyone else (and the three marine combat veterans) spent
the majority of their enlistments going around the world on the boat trips, "deploying" to safe places like Guam, embassy guard, etc.... I was shocked because
almost every Army veteran I come across from my time period has done at least a year long combat deployment, though a lot of Army veterans similair to me
have done two. By the numbers, does being a marine make you less likely to deploy to combat than a soldier? I tried researching this
information but found no data. I am asking because a young family member is interested in joining the military, and I was going to suggest
the Marines because from my observations there is a less chance to see combat, and you get to see the world (something you dont really do in the Army,
you just train and deploy to combat). Before I give him or his parents false information, I just wanted to find data on the topic.