Timeline with no date

The timeline is an excellent resource and could so easily be used to display lots of other sequential information but the necessity for a YEAR at the moment makes this difficult. A duplicate feature like the timeline but instead not date dependent - SequenceLine - where instead of a date there could be a sequence of numbers eg: step 1, step 2... or letters A, B, C... this would be very useful.

This would allow processes to be created on a timeline that happen on an annual rolling basis to be more easily created without having to edit the dates every year for example.