I'm not reading Nisekoi's light novel/manga, so I wonder, how much of the manga does the anime's second season cover? Because I found that only a few episodes contribute to the story itself and almost half of the entire season appeared to be fillers. Is it also the same in the manga?
I haven't been reading the Nisekoi manga either, but I have seen this chart, which purports to provide a correspondence between manga chapters and anime episodes:
Assuming this chart is accurate, Mihai Svet's answer is roughly correct, though there appear to be a number of omitted chapters (above and beyond those relegated to the OVAs).