It’s just an example for illustrative purposes and is by no means the only pattern. You can see here for example that the Journalism and English, BA < Northeastern University only has a 4 year / 2 co-op plan only listed, despite even being a combined major. Both require the same number of credit hours. You can do them with Fall or Spring cycle co-ops as well.
Any major at Northeastern can be done with 5 years / 3 co-op’s or 4 years / 2 co-ops, both using a summer session or more as is typical for Northeastern.