Is there a way to relatively compare two different segments in Google Analytics over time?
For example, I'd like to see the percentage of the segment mobile traffic (segment A) which comes from search (segment B) over time to answer the question: what part (%) of my mobile traffic has come from search engines over time? (has the contribution of search traffic to mobile increased or decreased)
The only way I know to answer questions like these is to plot both segments and see whether the lines are getting closer to eachother or further away from eachother.