Hbrenn, I am sorry that you are having issues with your phone freezing. This can be so many different possible things. How long has this been happening? Is your software up to date? Give us some specifics on what you have happening so we can dig deeper. Here is a link http://vz.to/1L0eWFE that will give you some steps to check as well. We are here to help any way we can.
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Have you deleted the apps and reinstalled them? That sometime helps. But if it's only those apps it's an app issue where they will need to send a new update. Facebook should have one soon. They do it every 2 weeks. I haven't had an issue with either app since iOS 9 although I haven't updated to the 9.0.2 version
I would suggest backing up everything via iCloud (including photos in iCloud Photo Library) then completely erase phone, "set up as new iPhone", then sign back into iCloud to get messages, photos, etc back (will have to redownload other apps).
This usually fixes issues. Otherwise, suggest a trip to the Genius Bar at Apple Store.