In previous discussions, I've mentioned some of the categories of stories that I've dreamed up to understand some of my reading and writing. This is the story told in chronological order, as someone advised Alice to do, starting at the beginning and then going on until you reach the end. Very simple, but strong. A to time B. 2.
Pure form is frame, inner, frame.
Obviously, this can be twisted and turned into lots of different forms - with the inner story framing another story, multiple inner stories, etc. In some cases, the frame is merely glue to transition. One reason these are used is to take various short stories and make a book-length presentation. This is a name I made up for a story where there are multiple levels interlaced. Note that a clear identification of which thread we are in is very necessary - a repeated sentence, the name of the viewpoint character, or even subtitles.