1. He was so shocked of what she asked for.
2. He was freaked out of what she asked for.
3. He was frightened of what she asked for.
4. He was scared of what she asked for.
a. Do the above sentences mean the same?
b. Arethe above phrases in bold interchangeable?
The first two are not correct English. The third and fourth are possible, but I suspect they don't mean what you intended them to. I have suggested before that you use a dictionary first. Often you will find a satisfactory answer there - immediately. If you have problems with the definitions or examples, then you can come back to this forum for help.