How often do you take a break from reading?

I take a break like every 5 minutes and it’s both bumming and frustrating me out. I want to finish this book asap (there’s just sooo many books, so little time??), but I feel like my brain is getting so tired after reading two to three pages.

Or maybe this is just a really hard book for me to get into completely. Currently reading One Hundred Years of Solitude and I just can’t not take a breather every now and then. I don’t remember being this way with easier novels.