What is "frame siding?"?

Question:The listing agent doesn't know what kind of siding the house is and guesses it is metal. The county website lists, "frame siding." I'm looking this up, but cannot find exactly what this kind of siding is.

Answers:
I think it just means the house is a frame house (not brick) and is covered with siding. The description is not specific enough to indicate what type of siding is on this frame house.