"Progression" is a word in LAW AND LEGAL, ENGLISH

That state of a busl-ness which is neither the commencement nor the end. Some act done after the matter has commenced, and before it is completed. Plowd. 343

Course; passage; lapse or process of time.

A regular succession of tones or chords; the movement
of the parts in harmony; the order of the modulations in a piece from
key to key.

The act of moving forward; a proceeding in a course;
motion onward.

Regular or proportional advance in increase or
decrease of numbers; continued proportion, arithmetical, geometrical,
or harmonic.