What's the difference between catastasis and epitasis?

Catastasis

Definition:

• (n.) That part of a speech, usually the exordium, in which the orator sets forth the subject matter to be discussed.
• (n.) The state, or condition of anything; constitution; habit of body.

Example Sentences:

Epitasis

Definition:

• (n.) That part which embraces the main action of a play, poem, and the like, and leads on to the catastrophe; -- opposed to protasis.
• (n.) The period of violence in a fever or disease; paroxysm.

Example Sentences: