progression

Concise Oxford English Dictionary © 2008 Oxford University Press:
progression/prəˈɡreʃn/

▶noun

• 1 gradual movement or development towards a destination or a more advanced state.

  ■ Music a passage or movement from one note or chord to another.

• 2 a number of things in a series.

• 3 Astrology a predictive technique in which the daily movement of the planets represents a year in the subject's life.

– derivatives
progressional adjective.