WP has an adequate discussion of paging, which I think I understand.. However I am confused by the articles repeated use of the term Page Frame.
I thought frames and pages were different things. Could someone please clarify the difference.
Short version: "page" means "virtual page" (i.e. a chunk of virtual address space) and "page frame" means "physical page" (i.e. a chunk of physical memory).
That's it, pretty much. It's important to keep the two concepts distinct because at any given time, a page may not be backed by a page frame (it could be a zero-fill page which hasn't been accessed, or paged out to secondary memory), and a page frame may back multiple pages (sometimes in different address spaces, e.g. shared memory or memory-mapped files).
Physical memory is organized into frames and virtual memory into pages. The "page frame" term is a bit confusing and in my opinion wikipedia shouldn't use it. What they really mean by "page frame" is a block/group/segment of physical memory, which is equivalent to a frame. So they should instead use the term "frame", not "page frame".
In short remember:
That is how i use it.
A page frame is a storage unit within the main memory, while a page is the contents in the frame.