Problem:
Evolution is traditionally spoken of as an inherited change over generations.
Question: Does evolution happen one change at a time - or are there multiple changes occurring between two successive generations?
Question: Is there a known timeline for the frequency of such changes in any species?
Something like...
20 Million years ago - Species X showed A, B, C.. Z characteristics
19 Million years ago - Species X following characteristics changed A'
17 Million years ago - Species X following characteristics changed B', C', Q', M'
16 Million years ago - Species X following characteristics changed A''
Please explain in detail.