I am thinking of the title of my chart, since the concept is there but the output is a bit too clumsy, I wonder if I can get any inspiration from here:
The chart is about showing a trend of a certain kind of infection rate in hospital. The chart can be adjusted to show the bars of all "January", "February", etc... from 2007-2010, all "Quarter 1", "Quarter 2", etc... from 2007-2010, and the bar for yearly data (2007-2010).
I know the monthly and quarterly bars can be grouped together, as their all refer to the "specific month/quarter" (I wonder if "specific" is the appropriate term here) across the years, but the yearly bars is a bit different. It is put here because of technical issue, they consider yearly bars as "specific year" across the years, but year itself does not include subsets of years.
Currently I can think of "Same Month/Quarter/Year Comparison of XXX Infection", I wonder if this can properly deliver my message.