Resume Redundancy

If you have multiple experiences that are in the same field (ie. 2+ banking internships or jobs, etc), is it redundant to repeat similar duties? Before I was in this situation, I was always cognizant about having line items reiterating the same skill or experience. Now that I've had a few jobs/internships in finance under my belt, I find it hard to avoid describing my time at a particular firm without indirectly referencing a skill that I gained elsewhere. For example, for each banking job I've had, I've spent a significant amount of time making pitchbooks. Would it be okay to talk about that in 2+ positions?

I know some will say, quantify and be specific. However, especially in this market, sometimes we make a lot of pitchbooks that hard difficulty to meaningfully quanity because don't really amount to anything...but they still take up a large chunk of my day.

Opinions?